5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2001 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
21 * This is the actual SILC server than handles everything relating to
22 * servicing the SILC connections. This is also a SILC router as a router
23 * is also normal server.
27 #include "serverincludes.h"
28 #include "server_internal.h"
30 /* Static prototypes */
31 SILC_TASK_CALLBACK(silc_server_connect_router);
32 SILC_TASK_CALLBACK(silc_server_connect_to_router);
33 SILC_TASK_CALLBACK(silc_server_connect_to_router_second);
34 SILC_TASK_CALLBACK(silc_server_connect_to_router_final);
35 SILC_TASK_CALLBACK(silc_server_accept_new_connection);
36 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second);
37 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final);
38 SILC_TASK_CALLBACK(silc_server_packet_process);
39 SILC_TASK_CALLBACK(silc_server_packet_parse_real);
40 SILC_TASK_CALLBACK(silc_server_timeout_remote);
41 SILC_TASK_CALLBACK(silc_server_failure_callback);
42 SILC_TASK_CALLBACK(silc_server_rekey_callback);
44 /* Allocates a new SILC server object. This has to be done before the server
45 can be used. After allocation one must call silc_server_init to initialize
46 the server. The new allocated server object is returned to the new_server
49 int silc_server_alloc(SilcServer *new_server)
53 SILC_LOG_DEBUG(("Allocating new server object"));
55 server = silc_calloc(1, sizeof(*server));
56 server->server_type = SILC_SERVER;
57 server->standalone = TRUE;
58 server->local_list = silc_calloc(1, sizeof(*server->local_list));
59 server->global_list = silc_calloc(1, sizeof(*server->global_list));
60 server->pending_commands = silc_dlist_init();
62 server->sim = silc_dlist_init();
70 /* Free's the SILC server object. This is called at the very end before
73 void silc_server_free(SilcServer server)
80 silc_free(server->local_list);
81 silc_free(server->global_list);
83 silc_rng_free(server->rng);
86 silc_pkcs_free(server->pkcs);
89 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
90 silc_dlist_del(server->sim, sim);
93 silc_dlist_uninit(server->sim);
96 silc_free(server->params);
98 if (server->pending_commands)
99 silc_dlist_uninit(server->pending_commands);
105 /* Initializes the entire SILC server. This is called always before running
106 the server. This is called only once at the initialization of the program.
107 This binds the server to its listenning port. After this function returns
108 one should call silc_server_run to start the server. This returns TRUE
109 when everything is ok to run the server. Configuration file must be
110 read and parsed before calling this. */
112 int silc_server_init(SilcServer server)
114 int *sock = NULL, sock_count = 0, i;
116 SilcServerEntry id_entry;
117 SilcIDListPurge purge;
118 SilcServerConfigSectionListenPort *listen;
120 SILC_LOG_DEBUG(("Initializing server"));
122 assert(server->config);
124 /* Set public and private keys */
125 if (!server->config->server_keys ||
126 !server->config->server_keys->public_key ||
127 !server->config->server_keys->private_key) {
128 SILC_LOG_ERROR(("Server public key and/or private key does not exist"));
131 server->public_key = server->config->server_keys->public_key;
132 server->private_key = server->config->server_keys->private_key;
134 /* XXX After server is made as Silc Server Library this can be given
135 as argument, for now this is hard coded */
136 server->params = silc_calloc(1, sizeof(*server->params));
137 server->params->retry_count = SILC_SERVER_RETRY_COUNT;
138 server->params->retry_interval_min = SILC_SERVER_RETRY_INTERVAL_MIN;
139 server->params->retry_interval_max = SILC_SERVER_RETRY_INTERVAL_MAX;
140 server->params->retry_keep_trying = FALSE;
141 server->params->protocol_timeout = 60;
142 server->params->require_reverse_mapping = FALSE;
144 /* Set log files where log message should be saved. */
145 server->config->server = server;
146 silc_server_config_setlogfiles(server->config);
148 /* Register all configured ciphers, PKCS and hash functions. */
149 if (!silc_server_config_register_ciphers(server->config))
150 silc_cipher_register_default();
151 if (!silc_server_config_register_pkcs(server->config))
152 silc_pkcs_register_default();
153 if (!silc_server_config_register_hashfuncs(server->config))
154 silc_hash_register_default();
155 if (!silc_server_config_register_hmacs(server->config))
156 silc_hmac_register_default();
158 /* Initialize random number generator for the server. */
159 server->rng = silc_rng_alloc();
160 silc_rng_init(server->rng);
161 silc_rng_global_init(server->rng);
163 /* Initialize hash functions for server to use */
164 silc_hash_alloc("md5", &server->md5hash);
165 silc_hash_alloc("sha1", &server->sha1hash);
167 /* Initialize none cipher */
168 silc_cipher_alloc("none", &server->none_cipher);
170 /* Allocate PKCS context for local public and private keys */
171 silc_pkcs_alloc(server->public_key->name, &server->pkcs);
172 silc_pkcs_public_key_set(server->pkcs, server->public_key);
173 silc_pkcs_private_key_set(server->pkcs, server->private_key);
175 /* Create a listening server. Note that our server can listen on multiple
176 ports. All listeners are created here and now. */
178 listen = server->config->listen_port;
182 tmp = silc_net_create_server(server->config->listen_port->port,
183 server->config->listen_port->listener_ip);
187 sock = silc_realloc(sock, (sizeof(int *) * (sock_count + 1)));
188 sock[sock_count] = tmp;
190 listen = listen->next;
193 /* Initialize ID caches */
194 server->local_list->clients =
195 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
196 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
197 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
199 /* These are allocated for normal server as well as these hold some
200 global information that the server has fetched from its router. For
201 router these are used as they are supposed to be used on router. */
202 server->global_list->clients =
203 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
204 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
205 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
207 /* Allocate the entire socket list that is used in server. Eventually
208 all connections will have entry in this table (it is a table of
209 pointers to the actual object that is allocated individually
211 server->sockets = silc_calloc(SILC_SERVER_MAX_CONNECTIONS,
212 sizeof(*server->sockets));
214 for (i = 0; i < sock_count; i++) {
215 SilcSocketConnection newsocket = NULL;
217 /* Set socket to non-blocking mode */
218 silc_net_set_socket_nonblock(sock[i]);
219 server->sock = sock[i];
221 /* Create a Server ID for the server. */
222 silc_id_create_server_id(sock[i], server->rng, &id);
228 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
229 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
230 server->id_type = SILC_ID_SERVER;
231 server->server_name = server->config->server_info->server_name;
233 /* Add ourselves to the server list. We don't have a router yet
234 beacuse we haven't established a route yet. It will be done later.
235 For now, NULL is sent as router. This allocates new entry to
238 silc_idlist_add_server(server->local_list,
239 server->config->server_info->server_name,
240 server->server_type, server->id, NULL, NULL);
242 SILC_LOG_ERROR(("Could not add ourselves to cache"));
245 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
247 /* Add ourselves also to the socket table. The entry allocated above
248 is sent as argument for fast referencing in the future. */
249 silc_socket_alloc(sock[i], SILC_SOCKET_TYPE_SERVER, id_entry,
252 server->sockets[sock[i]] = newsocket;
254 /* Perform name and address lookups to resolve the listenning address
256 if (!silc_net_check_local_by_sock(sock[i], &newsocket->hostname,
258 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
260 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
261 newsocket->hostname ? newsocket->hostname :
262 newsocket->ip ? newsocket->ip : ""));
263 server->stat.conn_failures++;
266 if (!newsocket->hostname)
267 newsocket->hostname = strdup(newsocket->ip);
269 newsocket->port = silc_net_get_local_port(sock[i]);
271 /* Put the allocated socket pointer also to the entry allocated above
272 for fast back-referencing to the socket list. */
273 id_entry->connection = (void *)server->sockets[sock[i]];
274 server->id_entry = id_entry;
277 /* Register protocols */
278 silc_server_protocols_register();
280 /* Initialize the scheduler. */
281 server->schedule = silc_schedule_init(SILC_SERVER_MAX_CONNECTIONS);
282 if (!server->schedule)
285 /* Add the first task to the scheduler. This is task that is executed by
286 timeout. It expires as soon as the caller calls silc_server_run. This
287 task performs authentication protocol and key exchange with our
289 silc_schedule_task_add(server->schedule, sock[0],
290 silc_server_connect_to_router,
291 (void *)server, 0, 1,
293 SILC_TASK_PRI_NORMAL);
295 /* Add listener task to the scheduler. This task receives new connections
296 to the server. This task remains on the queue until the end of the
298 silc_schedule_task_add(server->schedule, sock[0],
299 silc_server_accept_new_connection,
300 (void *)server, 0, 0,
302 SILC_TASK_PRI_NORMAL);
303 server->listenning = TRUE;
305 /* If server connections has been configured then we must be router as
306 normal server cannot have server connections, only router connections. */
307 if (server->config->servers) {
308 SilcServerConfigSectionServerConnection *ptr = server->config->servers;
310 server->server_type = SILC_ROUTER;
312 if (ptr->backup_router) {
313 server->server_type = SILC_BACKUP_ROUTER;
314 server->backup_router = TRUE;
321 /* Register the ID Cache purge task. This periodically purges the ID cache
322 and removes the expired cache entries. */
324 /* Clients local list */
325 purge = silc_calloc(1, sizeof(*purge));
326 purge->cache = server->local_list->clients;
327 purge->schedule = server->schedule;
328 silc_schedule_task_add(purge->schedule, 0,
330 (void *)purge, 600, 0,
331 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
333 /* Clients global list */
334 purge = silc_calloc(1, sizeof(*purge));
335 purge->cache = server->global_list->clients;
336 purge->schedule = server->schedule;
337 silc_schedule_task_add(purge->schedule, 0,
339 (void *)purge, 300, 0,
340 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
342 SILC_LOG_DEBUG(("Server initialized"));
344 /* We are done here, return succesfully */
348 for (i = 0; i < sock_count; i++)
349 silc_net_close_server(sock[i]);
354 /* Fork server to background and set gid+uid to non-root.
355 Silcd will not run as root, so trying to set either user or group to
356 root will cause silcd to exit. */
358 void silc_server_daemonise(SilcServer server)
360 /* Are we executing silcd as root or a regular user? */
367 if (!server->config->identity || !server->config->identity->user ||
368 !server->config->identity->group) {
369 fprintf(stderr, "Error:"
370 "\tSILC server must not be run as root. For the security of your\n"
371 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
372 "\tuser account. Modify the [Identity] configuration section to run\n"
373 "\tthe server as non-root user.\n");
377 /* Get the values given for user and group in configuration file */
378 user=server->config->identity->user;
379 group=server->config->identity->group;
381 /* Check whether the user/group information is text */
382 if (atoi(user)!=0 || atoi(group)!=0) {
383 SILC_LOG_DEBUG(("Invalid user and/or group information"));
384 SILC_LOG_DEBUG(("User and/or group given as number"));
385 fprintf(stderr, "Invalid user and/or group information\n");
386 fprintf(stderr, "Please assign them as names, not numbers\n");
390 /* Catch the nasty incident of string "0" returning 0 from atoi */
391 if (strcmp("0", user)==0 || strcmp("0", group)==0) {
392 SILC_LOG_DEBUG(("User and/or group configured to 0. Unacceptable"));
393 fprintf(stderr, "User and/or group configured to 0. Exiting\n");
401 fprintf(stderr, "No such user %s found\n", user);
406 fprintf(stderr, "No such group %s found\n", group);
410 /* Check whether user and/or group is set to root. If yes, exit
411 immediately. Otherwise, setgid and setuid server to user.group */
412 if (gr->gr_gid==0 || pw->pw_uid==0) {
413 fprintf(stderr, "Error:"
414 "\tSILC server must not be run as root. For the security of your\n"
415 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
416 "\tuser account. Modify the [Identity] configuration section to run\n"
417 "\tthe server as non-root user.\n");
420 /* Fork server to background, making it a daemon */
422 SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
423 SILC_LOG_DEBUG(("Forking SILC server to background"));
428 SILC_LOG_DEBUG(("Changing to group %s", group));
429 if(setgid(gr->gr_gid)==0) {
430 SILC_LOG_DEBUG(("Setgid to %s", group));
432 SILC_LOG_DEBUG(("Setgid to %s failed", group));
433 fprintf(stderr, "Tried to setgid %s but no such group. Exiting\n",
437 SILC_LOG_DEBUG(("Changing to user nobody"));
438 if(setuid(pw->pw_uid)==0) {
439 SILC_LOG_DEBUG(("Setuid to %s", user));
441 SILC_LOG_DEBUG(("Setuid to %s failed", user));
442 fprintf(stderr, "Tried to setuid %s but no such user. Exiting\n",
448 /* Fork server to background, making it a daemon */
450 SILC_LOG_DEBUG(("Server started as user"));
451 SILC_LOG_DEBUG(("Forking SILC server to background"));
458 /* The heart of the server. This runs the scheduler thus runs the server.
459 When this returns the server has been stopped and the program will
462 void silc_server_run(SilcServer server)
464 SILC_LOG_DEBUG(("Running server"));
466 SILC_LOG_INFO(("SILC Server started"));
468 /* Start the scheduler, the heart of the SILC server. When this returns
469 the program will be terminated. */
470 silc_schedule(server->schedule);
473 /* Stops the SILC server. This function is used to shutdown the server.
474 This is usually called after the scheduler has returned. After stopping
475 the server one should call silc_server_free. */
477 void silc_server_stop(SilcServer server)
479 SILC_LOG_DEBUG(("Stopping server"));
481 silc_schedule_stop(server->schedule);
482 silc_schedule_uninit(server->schedule);
484 silc_server_protocols_unregister();
486 SILC_LOG_DEBUG(("Server stopped"));
489 /* Function that is called when the network connection to a router has
490 been established. This will continue with the key exchange protocol
491 with the remote router. */
493 void silc_server_start_key_exchange(SilcServer server,
494 SilcServerConnection sconn,
497 SilcSocketConnection newsocket;
498 SilcProtocol protocol;
499 SilcServerKEInternalContext *proto_ctx;
502 /* Set socket options */
503 silc_net_set_socket_nonblock(sock);
504 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
506 /* Create socket connection for the connection. Even though we
507 know that we are connecting to a router we will mark the socket
508 to be unknown connection until we have executed authentication
510 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
511 server->sockets[sock] = newsocket;
512 newsocket->hostname = strdup(sconn->remote_host);
513 newsocket->ip = strdup(sconn->remote_host);
514 newsocket->port = sconn->remote_port;
515 sconn->sock = newsocket;
517 /* Allocate internal protocol context. This is sent as context
519 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
520 proto_ctx->server = (void *)server;
521 proto_ctx->context = (void *)sconn;
522 proto_ctx->sock = newsocket;
523 proto_ctx->rng = server->rng;
524 proto_ctx->responder = FALSE;
526 /* Perform key exchange protocol. silc_server_connect_to_router_second
527 will be called after the protocol is finished. */
528 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
529 &protocol, proto_ctx,
530 silc_server_connect_to_router_second);
531 newsocket->protocol = protocol;
533 /* Register a timeout task that will be executed if the protocol
534 is not executed within set limit. */
535 proto_ctx->timeout_task =
536 silc_schedule_task_add(server->schedule, sock,
537 silc_server_timeout_remote,
538 server, server->params->protocol_timeout,
539 server->params->protocol_timeout_usec,
543 /* Register the connection for network input and output. This sets
544 that scheduler will listen for incoming packets for this connection
545 and sets that outgoing packets may be sent to this connection as
546 well. However, this doesn't set the scheduler for outgoing traffic,
547 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
548 later when outgoing data is available. */
549 context = (void *)server;
550 SILC_REGISTER_CONNECTION_FOR_IO(sock);
552 /* Run the protocol */
553 silc_protocol_execute(protocol, server->schedule, 0, 0);
556 /* Timeout callback that will be called to retry connecting to remote
557 router. This is used by both normal and router server. This will wait
558 before retrying the connecting. The timeout is generated by exponential
559 backoff algorithm. */
561 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
563 SilcServerConnection sconn = (SilcServerConnection)context;
564 SilcServer server = sconn->server;
566 SILC_LOG_INFO(("Retrying connecting to a router"));
568 /* Calculate next timeout */
569 if (sconn->retry_count >= 1) {
570 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
571 if (sconn->retry_timeout > SILC_SERVER_RETRY_INTERVAL_MAX)
572 sconn->retry_timeout = SILC_SERVER_RETRY_INTERVAL_MAX;
574 sconn->retry_timeout = server->params->retry_interval_min;
576 sconn->retry_count++;
577 sconn->retry_timeout = sconn->retry_timeout +
578 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
580 /* If we've reached max retry count, give up. */
581 if (sconn->retry_count > server->params->retry_count &&
582 server->params->retry_keep_trying == FALSE) {
583 SILC_LOG_ERROR(("Could not connect to router, giving up"));
587 /* Wait one before retrying */
588 silc_schedule_task_add(server->schedule, fd, silc_server_connect_router,
589 context, sconn->retry_timeout,
590 server->params->retry_interval_min_usec,
591 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
594 /* Generic routine to use connect to a router. */
596 SILC_TASK_CALLBACK(silc_server_connect_router)
598 SilcServerConnection sconn = (SilcServerConnection)context;
599 SilcServer server = sconn->server;
602 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
603 (sconn->backup ? "backup router" : "router"),
604 sconn->remote_host, sconn->remote_port));
606 server->router_connect = time(0);
608 /* Connect to remote host */
609 sock = silc_net_create_connection(server->config->listen_port->local_ip,
613 SILC_LOG_ERROR(("Could not connect to router"));
614 silc_schedule_task_add(server->schedule, fd,
615 silc_server_connect_to_router_retry,
616 context, 0, 1, SILC_TASK_TIMEOUT,
617 SILC_TASK_PRI_NORMAL);
621 /* Continue with key exchange protocol */
622 silc_server_start_key_exchange(server, sconn, sock);
625 /* This function connects to our primary router or if we are a router this
626 establishes all our primary routes. This is called at the start of the
627 server to do authentication and key exchange with our router - called
630 SILC_TASK_CALLBACK(silc_server_connect_to_router)
632 SilcServer server = (SilcServer)context;
633 SilcServerConnection sconn;
634 SilcServerConfigSectionServerConnection *ptr;
636 SILC_LOG_DEBUG(("Connecting to router(s)"));
638 if (server->server_type == SILC_SERVER) {
639 SILC_LOG_DEBUG(("We are normal server"));
640 } else if (server->server_type == SILC_ROUTER) {
641 SILC_LOG_DEBUG(("We are router"));
643 SILC_LOG_DEBUG(("We are backup router/normal server"));
646 /* Create the connections to all our routes */
647 ptr = server->config->routers;
650 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
651 ptr->backup_router ? "Backup router" : "Router",
652 ptr->initiator ? "Initiator" : "Responder",
653 ptr->host, ptr->port));
655 if (ptr->initiator) {
656 /* Allocate connection object for hold connection specific stuff. */
657 sconn = silc_calloc(1, sizeof(*sconn));
658 sconn->server = server;
659 sconn->remote_host = strdup(ptr->host);
660 sconn->remote_port = ptr->port;
661 sconn->backup = ptr->backup_router;
663 silc_schedule_task_add(server->schedule, fd,
664 silc_server_connect_router,
665 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
666 SILC_TASK_PRI_NORMAL);
675 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
677 /* There wasn't a configured router, we will continue but we don't
678 have a connection to outside world. We will be standalone server. */
679 server->standalone = TRUE;
682 /* Second part of connecting to router(s). Key exchange protocol has been
683 executed and now we will execute authentication protocol. */
685 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
687 SilcProtocol protocol = (SilcProtocol)context;
688 SilcServerKEInternalContext *ctx =
689 (SilcServerKEInternalContext *)protocol->context;
690 SilcServer server = (SilcServer)ctx->server;
691 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
692 SilcSocketConnection sock = ctx->sock;
693 SilcServerConnAuthInternalContext *proto_ctx;
694 SilcServerConfigSectionServerConnection *conn = NULL;
696 SILC_LOG_DEBUG(("Start"));
698 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
699 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
700 /* Error occured during protocol */
701 silc_protocol_free(protocol);
702 sock->protocol = NULL;
703 silc_ske_free_key_material(ctx->keymat);
705 silc_packet_context_free(ctx->packet);
707 silc_ske_free(ctx->ske);
708 silc_free(ctx->dest_id);
710 silc_schedule_task_del_by_callback(server->schedule,
711 silc_server_failure_callback);
712 silc_server_disconnect_remote(server, sock, "Server closed connection: "
713 "Key exchange failed");
717 /* We now have the key material as the result of the key exchange
718 protocol. Take the key material into use. Free the raw key material
719 as soon as we've set them into use. */
720 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
721 ctx->ske->prop->cipher,
722 ctx->ske->prop->pkcs,
723 ctx->ske->prop->hash,
724 ctx->ske->prop->hmac,
725 ctx->ske->prop->group,
727 silc_protocol_free(protocol);
728 sock->protocol = NULL;
729 silc_ske_free_key_material(ctx->keymat);
731 silc_packet_context_free(ctx->packet);
733 silc_ske_free(ctx->ske);
734 silc_free(ctx->dest_id);
736 silc_schedule_task_del_by_callback(server->schedule,
737 silc_server_failure_callback);
738 silc_server_disconnect_remote(server, sock, "Server closed connection: "
739 "Key exchange failed");
742 silc_ske_free_key_material(ctx->keymat);
744 /* Allocate internal context for the authentication protocol. This
745 is sent as context for the protocol. */
746 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
747 proto_ctx->server = (void *)server;
748 proto_ctx->context = (void *)sconn;
749 proto_ctx->sock = sock;
750 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
751 proto_ctx->dest_id_type = ctx->dest_id_type;
752 proto_ctx->dest_id = ctx->dest_id;
754 /* Resolve the authentication method used in this connection. Check if
755 we find a match from user configured connections */
756 conn = silc_server_config_find_router_conn(server->config,
760 /* Match found. Use the configured authentication method */
761 proto_ctx->auth_meth = conn->auth_meth;
762 if (conn->auth_data) {
763 proto_ctx->auth_data = strdup(conn->auth_data);
764 proto_ctx->auth_data_len = strlen(conn->auth_data);
767 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
768 sock->hostname, sock->ip, sock->port));
769 silc_protocol_free(protocol);
770 sock->protocol = NULL;
772 silc_packet_context_free(ctx->packet);
774 silc_ske_free(ctx->ske);
775 silc_free(ctx->dest_id);
777 silc_schedule_task_del_by_callback(server->schedule,
778 silc_server_failure_callback);
779 silc_server_disconnect_remote(server, sock, "Server closed connection: "
780 "Key exchange failed");
784 /* Free old protocol as it is finished now */
785 silc_protocol_free(protocol);
787 silc_packet_context_free(ctx->packet);
789 sock->protocol = NULL;
791 /* Allocate the authentication protocol. This is allocated here
792 but we won't start it yet. We will be receiving party of this
793 protocol thus we will wait that connecting party will make
795 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
796 &sock->protocol, proto_ctx,
797 silc_server_connect_to_router_final);
799 /* Register timeout task. If the protocol is not executed inside
800 this timelimit the connection will be terminated. Currently
801 this is 15 seconds and is hard coded limit (XXX). */
802 proto_ctx->timeout_task =
803 silc_schedule_task_add(server->schedule, sock->sock,
804 silc_server_timeout_remote,
805 (void *)server, 15, 0,
809 /* Run the protocol */
810 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
813 /* Finalizes the connection to router. Registers a server task to the
814 queue so that we can accept new connections. */
816 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
818 SilcProtocol protocol = (SilcProtocol)context;
819 SilcServerConnAuthInternalContext *ctx =
820 (SilcServerConnAuthInternalContext *)protocol->context;
821 SilcServer server = (SilcServer)ctx->server;
822 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
823 SilcSocketConnection sock = ctx->sock;
824 SilcServerEntry id_entry;
826 SilcServerHBContext hb_context;
827 unsigned char *id_string;
829 SilcIDListData idata;
831 SILC_LOG_DEBUG(("Start"));
833 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
834 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
835 /* Error occured during protocol */
836 silc_free(ctx->dest_id);
837 silc_server_disconnect_remote(server, sock, "Server closed connection: "
838 "Authentication failed");
842 /* Add a task to the queue. This task receives new connections to the
843 server. This task remains on the queue until the end of the program. */
844 if (!server->listenning && !sconn->backup) {
845 silc_schedule_task_add(server->schedule, server->sock,
846 silc_server_accept_new_connection,
847 (void *)server, 0, 0,
849 SILC_TASK_PRI_NORMAL);
850 server->listenning = TRUE;
853 /* Send NEW_SERVER packet to the router. We will become registered
854 to the SILC network after sending this packet. */
855 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
856 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
857 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
858 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
859 silc_buffer_format(packet,
860 SILC_STR_UI_SHORT(id_len),
861 SILC_STR_UI_XNSTRING(id_string, id_len),
862 SILC_STR_UI_SHORT(strlen(server->server_name)),
863 SILC_STR_UI_XNSTRING(server->server_name,
864 strlen(server->server_name)),
867 /* Send the packet */
868 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
869 packet->data, packet->len, TRUE);
870 silc_buffer_free(packet);
871 silc_free(id_string);
873 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
875 /* Check that we do not have this ID already */
876 id_entry = silc_idlist_find_server_by_id(server->local_list,
877 ctx->dest_id, TRUE, NULL);
879 silc_idcache_del_by_context(server->local_list->servers, id_entry);
881 id_entry = silc_idlist_find_server_by_id(server->global_list,
882 ctx->dest_id, TRUE, NULL);
884 silc_idcache_del_by_context(server->global_list->servers, id_entry);
887 SILC_LOG_DEBUG(("New server id(%s)",
888 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
890 /* Add the connected router to local server list */
891 id_entry = silc_idlist_add_server(server->local_list, strdup(sock->hostname),
892 SILC_ROUTER, ctx->dest_id, NULL, sock);
894 silc_free(ctx->dest_id);
895 silc_server_disconnect_remote(server, sock, "Server closed connection: "
896 "Authentication failed");
900 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
901 silc_free(sock->user_data);
902 sock->user_data = (void *)id_entry;
903 sock->type = SILC_SOCKET_TYPE_ROUTER;
904 idata = (SilcIDListData)sock->user_data;
905 idata->status |= SILC_IDLIST_STATUS_REGISTERED;
907 /* Perform keepalive. The `hb_context' will be freed automatically
908 when finally calling the silc_socket_free function. XXX hardcoded
910 hb_context = silc_calloc(1, sizeof(*hb_context));
911 hb_context->server = server;
912 silc_socket_set_heartbeat(sock, 600, hb_context,
913 silc_server_perform_heartbeat,
916 /* Register re-key timeout */
917 idata->rekey->timeout = 3600; /* XXX hardcoded */
918 idata->rekey->context = (void *)server;
919 silc_schedule_task_add(server->schedule, sock->sock,
920 silc_server_rekey_callback,
921 (void *)sock, idata->rekey->timeout, 0,
922 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
924 if (!sconn->backup) {
925 /* Mark this router our primary router if we're still standalone */
926 if (server->standalone) {
927 server->id_entry->router = id_entry;
928 server->router = id_entry;
929 server->standalone = FALSE;
931 /* If we are router then announce our possible servers. */
932 if (server->server_type == SILC_ROUTER)
933 silc_server_announce_servers(server, FALSE, 0,
934 server->router->connection);
936 /* Announce our clients and channels to the router */
937 silc_server_announce_clients(server, 0, server->router->connection);
938 silc_server_announce_channels(server, 0, server->router->connection);
941 /* Add this server to be our backup router */
942 silc_server_backup_add(server, id_entry, FALSE);
945 sock->protocol = NULL;
947 /* Call the completion callback to indicate that we've connected to
950 (*sconn->callback)(server, id_entry, sconn->callback_context);
953 /* Free the temporary connection data context */
955 silc_free(sconn->remote_host);
959 /* Free the protocol object */
960 if (sock->protocol == protocol)
961 sock->protocol = NULL;
962 silc_protocol_free(protocol);
964 silc_packet_context_free(ctx->packet);
966 silc_ske_free(ctx->ske);
970 /* Host lookup callbcak that is called after the incoming connection's
971 IP and FQDN lookup is performed. This will actually check the acceptance
972 of the incoming connection and will register the key exchange protocol
973 for this connection. */
976 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
979 SilcServer server = (SilcServer)context;
980 SilcServerKEInternalContext *proto_ctx;
981 void *cconfig, *sconfig, *rconfig;
982 SilcServerConfigSectionDenyConnection *deny;
985 SILC_LOG_DEBUG(("Start"));
987 /* Check whether we could resolve both IP and FQDN. */
988 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
989 server->params->require_reverse_mapping)) {
990 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
991 sock->hostname ? sock->hostname :
992 sock->ip ? sock->ip : ""));
993 server->stat.conn_failures++;
994 silc_server_disconnect_remote(server, sock,
995 "Server closed connection: Unknown host");
999 /* Register the connection for network input and output. This sets
1000 that scheduler will listen for incoming packets for this connection
1001 and sets that outgoing packets may be sent to this connection as well.
1002 However, this doesn't set the scheduler for outgoing traffic, it
1003 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1004 later when outgoing data is available. */
1005 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1007 SILC_LOG_INFO(("Incoming connection from %s (%s)", sock->hostname,
1010 port = server->sockets[server->sock]->port; /* Listenning port */
1012 /* Check whether this connection is denied to connect to us. */
1013 deny = silc_server_config_denied_conn(server->config, sock->ip, port);
1015 deny = silc_server_config_denied_conn(server->config, sock->hostname,
1018 /* The connection is denied */
1019 SILC_LOG_INFO(("Connection %s (%s) is denied",
1020 sock->hostname, sock->ip));
1021 silc_server_disconnect_remote(server, sock, deny->comment ?
1023 "Server closed connection: "
1024 "Connection refused");
1025 server->stat.conn_failures++;
1029 /* Check whether we have configred this sort of connection at all. We
1030 have to check all configurations since we don't know what type of
1031 connection this is. */
1032 if (!(cconfig = silc_server_config_find_client_conn(server->config,
1034 cconfig = silc_server_config_find_client_conn(server->config,
1037 if (!(sconfig = silc_server_config_find_server_conn(server->config,
1040 sconfig = silc_server_config_find_server_conn(server->config,
1043 if (!(rconfig = silc_server_config_find_router_conn(server->config,
1045 rconfig = silc_server_config_find_router_conn(server->config,
1048 if (!cconfig && !sconfig && !rconfig) {
1049 silc_server_disconnect_remote(server, sock,
1050 "Server closed connection: "
1051 "Connection refused");
1052 server->stat.conn_failures++;
1056 /* The connection is allowed */
1058 /* Allocate internal context for key exchange protocol. This is
1059 sent as context for the protocol. */
1060 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1061 proto_ctx->server = context;
1062 proto_ctx->sock = sock;
1063 proto_ctx->rng = server->rng;
1064 proto_ctx->responder = TRUE;
1065 proto_ctx->cconfig = cconfig;
1066 proto_ctx->sconfig = sconfig;
1067 proto_ctx->rconfig = rconfig;
1069 /* Prepare the connection for key exchange protocol. We allocate the
1070 protocol but will not start it yet. The connector will be the
1071 initiator of the protocol thus we will wait for initiation from
1072 there before we start the protocol. */
1073 server->stat.auth_attempts++;
1074 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1075 &sock->protocol, proto_ctx,
1076 silc_server_accept_new_connection_second);
1078 /* Register a timeout task that will be executed if the connector
1079 will not start the key exchange protocol within 60 seconds. For
1080 now, this is a hard coded limit. After 60 secs the connection will
1081 be closed if the key exchange protocol has not been started. */
1082 proto_ctx->timeout_task =
1083 silc_schedule_task_add(server->schedule, sock->sock,
1084 silc_server_timeout_remote,
1090 /* Accepts new connections to the server. Accepting new connections are
1091 done in three parts to make it async. */
1093 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1095 SilcServer server = (SilcServer)context;
1096 SilcSocketConnection newsocket;
1099 SILC_LOG_DEBUG(("Accepting new connection"));
1101 server->stat.conn_attempts++;
1103 sock = silc_net_accept_connection(server->sock);
1105 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1106 server->stat.conn_failures++;
1110 /* Check max connections */
1111 if (sock > SILC_SERVER_MAX_CONNECTIONS) {
1112 SILC_LOG_ERROR(("Refusing connection, server is full"));
1113 server->stat.conn_failures++;
1117 /* Set socket options */
1118 silc_net_set_socket_nonblock(sock);
1119 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1121 /* We don't create a ID yet, since we don't know what type of connection
1122 this is yet. But, we do add the connection to the socket table. */
1123 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1124 server->sockets[sock] = newsocket;
1126 /* Perform asynchronous host lookup. This will lookup the IP and the
1127 FQDN of the remote connection. After the lookup is done the connection
1128 is accepted further. */
1129 silc_socket_host_lookup(newsocket, TRUE,
1130 silc_server_accept_new_connection_lookup, context,
1134 /* Second part of accepting new connection. Key exchange protocol has been
1135 performed and now it is time to do little connection authentication
1136 protocol to figure out whether this connection is client or server
1137 and whether it has right to access this server (especially server
1138 connections needs to be authenticated). */
1140 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1142 SilcProtocol protocol = (SilcProtocol)context;
1143 SilcServerKEInternalContext *ctx =
1144 (SilcServerKEInternalContext *)protocol->context;
1145 SilcServer server = (SilcServer)ctx->server;
1146 SilcSocketConnection sock = ctx->sock;
1147 SilcServerConnAuthInternalContext *proto_ctx;
1149 SILC_LOG_DEBUG(("Start"));
1151 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1152 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1153 /* Error occured during protocol */
1154 silc_protocol_free(protocol);
1155 sock->protocol = NULL;
1156 silc_ske_free_key_material(ctx->keymat);
1158 silc_packet_context_free(ctx->packet);
1160 silc_ske_free(ctx->ske);
1161 silc_free(ctx->dest_id);
1163 silc_schedule_task_del_by_callback(server->schedule,
1164 silc_server_failure_callback);
1165 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1166 "Key exchange failed");
1167 server->stat.auth_failures++;
1171 /* We now have the key material as the result of the key exchange
1172 protocol. Take the key material into use. Free the raw key material
1173 as soon as we've set them into use. */
1174 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
1175 ctx->ske->prop->cipher,
1176 ctx->ske->prop->pkcs,
1177 ctx->ske->prop->hash,
1178 ctx->ske->prop->hmac,
1179 ctx->ske->prop->group,
1181 silc_protocol_free(protocol);
1182 sock->protocol = NULL;
1183 silc_ske_free_key_material(ctx->keymat);
1185 silc_packet_context_free(ctx->packet);
1187 silc_ske_free(ctx->ske);
1188 silc_free(ctx->dest_id);
1190 silc_schedule_task_del_by_callback(server->schedule,
1191 silc_server_failure_callback);
1192 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1193 "Key exchange failed");
1194 server->stat.auth_failures++;
1197 silc_ske_free_key_material(ctx->keymat);
1199 /* Allocate internal context for the authentication protocol. This
1200 is sent as context for the protocol. */
1201 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1202 proto_ctx->server = (void *)server;
1203 proto_ctx->sock = sock;
1204 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1205 proto_ctx->responder = TRUE;
1206 proto_ctx->dest_id_type = ctx->dest_id_type;
1207 proto_ctx->dest_id = ctx->dest_id;
1208 proto_ctx->cconfig = ctx->cconfig;
1209 proto_ctx->sconfig = ctx->sconfig;
1210 proto_ctx->rconfig = ctx->rconfig;
1212 /* Free old protocol as it is finished now */
1213 silc_protocol_free(protocol);
1215 silc_packet_context_free(ctx->packet);
1217 sock->protocol = NULL;
1219 /* Allocate the authentication protocol. This is allocated here
1220 but we won't start it yet. We will be receiving party of this
1221 protocol thus we will wait that connecting party will make
1222 their first move. */
1223 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1224 &sock->protocol, proto_ctx,
1225 silc_server_accept_new_connection_final);
1227 /* Register timeout task. If the protocol is not executed inside
1228 this timelimit the connection will be terminated. Currently
1229 this is 60 seconds and is hard coded limit (XXX). */
1230 proto_ctx->timeout_task =
1231 silc_schedule_task_add(server->schedule, sock->sock,
1232 silc_server_timeout_remote,
1233 (void *)server, 60, 0,
1238 /* Final part of accepting new connection. The connection has now
1239 been authenticated and keys has been exchanged. We also know whether
1240 this is client or server connection. */
1242 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1244 SilcProtocol protocol = (SilcProtocol)context;
1245 SilcServerConnAuthInternalContext *ctx =
1246 (SilcServerConnAuthInternalContext *)protocol->context;
1247 SilcServer server = (SilcServer)ctx->server;
1248 SilcSocketConnection sock = ctx->sock;
1249 SilcServerHBContext hb_context;
1250 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1251 void *id_entry = NULL;
1253 SILC_LOG_DEBUG(("Start"));
1255 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1256 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1257 /* Error occured during protocol */
1258 silc_protocol_free(protocol);
1259 sock->protocol = NULL;
1261 silc_packet_context_free(ctx->packet);
1263 silc_ske_free(ctx->ske);
1264 silc_free(ctx->dest_id);
1267 sock->protocol = NULL;
1268 silc_schedule_task_del_by_callback(server->schedule,
1269 silc_server_failure_callback);
1270 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1271 "Authentication failed");
1272 server->stat.auth_failures++;
1276 entry->data.last_receive = time(NULL);
1278 switch (ctx->conn_type) {
1279 case SILC_SOCKET_TYPE_CLIENT:
1281 SilcClientEntry client;
1283 SILC_LOG_DEBUG(("Remote host is client"));
1284 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1287 /* Add the client to the client ID cache. The nickname and Client ID
1288 and other information is created after we have received NEW_CLIENT
1289 packet from client. */
1290 client = silc_idlist_add_client(server->local_list,
1291 NULL, NULL, NULL, NULL, NULL, sock);
1293 SILC_LOG_ERROR(("Could not add new client to cache"));
1294 silc_free(sock->user_data);
1295 silc_server_disconnect_remote(server, sock,
1296 "Server closed connection: "
1297 "Authentication failed");
1298 server->stat.auth_failures++;
1303 server->stat.my_clients++;
1304 server->stat.clients++;
1305 if (server->server_type == SILC_ROUTER)
1306 server->stat.cell_clients++;
1308 id_entry = (void *)client;
1311 case SILC_SOCKET_TYPE_SERVER:
1312 case SILC_SOCKET_TYPE_ROUTER:
1314 SilcServerEntry new_server;
1315 SilcServerConfigSectionServerConnection *conn =
1316 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1317 ctx->sconfig : ctx->rconfig;
1319 SILC_LOG_DEBUG(("Remote host is %s",
1320 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1321 "server" : (conn->backup_router ?
1322 "backup router" : "router")));
1323 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1324 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1325 "server" : (conn->backup_router ?
1326 "backup router" : "router")));
1328 /* Add the server into server cache. The server name and Server ID
1329 is updated after we have received NEW_SERVER packet from the
1330 server. We mark ourselves as router for this server if we really
1333 silc_idlist_add_server(server->local_list, NULL,
1334 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1335 SILC_SERVER : SILC_ROUTER, NULL,
1336 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1338 (conn->backup_router ? server->id_entry :
1341 SILC_LOG_ERROR(("Could not add new server to cache"));
1342 silc_free(sock->user_data);
1343 silc_server_disconnect_remote(server, sock,
1344 "Server closed connection: "
1345 "Authentication failed");
1346 server->stat.auth_failures++;
1351 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER)
1352 server->stat.my_servers++;
1354 server->stat.my_routers++;
1355 server->stat.servers++;
1357 id_entry = (void *)new_server;
1359 /* If the incoming connection is router and marked as backup router
1360 then add it to be one of our backups */
1361 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && conn->backup_router) {
1362 silc_server_backup_add(server, new_server, conn->backup_local);
1364 /* Change it back to SERVER type since that's what it really is. */
1365 if (conn->backup_local) {
1366 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
1367 new_server->server_type = SILC_BACKUP_ROUTER;
1371 /* Check whether this connection is to be our primary router connection
1372 if we do not already have the primary route. */
1373 if (server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1374 if (silc_server_config_is_primary_route(server->config) &&
1378 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1379 server->standalone = FALSE;
1380 if (!server->id_entry->router) {
1381 server->id_entry->router = id_entry;
1382 server->router = id_entry;
1392 sock->type = ctx->conn_type;
1394 /* Add the common data structure to the ID entry. */
1396 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1398 /* Add to sockets internal pointer for fast referencing */
1399 silc_free(sock->user_data);
1400 sock->user_data = id_entry;
1402 /* Connection has been fully established now. Everything is ok. */
1403 SILC_LOG_DEBUG(("New connection authenticated"));
1405 /* Perform keepalive. The `hb_context' will be freed automatically
1406 when finally calling the silc_socket_free function. XXX hardcoded
1408 hb_context = silc_calloc(1, sizeof(*hb_context));
1409 hb_context->server = server;
1410 silc_socket_set_heartbeat(sock, 600, hb_context,
1411 silc_server_perform_heartbeat,
1415 silc_schedule_task_del_by_callback(server->schedule,
1416 silc_server_failure_callback);
1417 silc_protocol_free(protocol);
1419 silc_packet_context_free(ctx->packet);
1421 silc_ske_free(ctx->ske);
1422 silc_free(ctx->dest_id);
1424 sock->protocol = NULL;
1427 /* This function is used to read packets from network and send packets to
1428 network. This is usually a generic task. */
1430 SILC_TASK_CALLBACK(silc_server_packet_process)
1432 SilcServer server = (SilcServer)context;
1433 SilcSocketConnection sock = server->sockets[fd];
1434 SilcIDListData idata;
1435 SilcCipher cipher = NULL;
1436 SilcHmac hmac = NULL;
1442 SILC_LOG_DEBUG(("Processing packet"));
1444 /* Packet sending */
1446 if (type == SILC_TASK_WRITE) {
1447 /* Do not send data to disconnected connection */
1448 if (SILC_IS_DISCONNECTED(sock))
1451 server->stat.packets_sent++;
1453 if (sock->outbuf->data - sock->outbuf->head)
1454 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1456 /* Send the packet */
1457 ret = silc_packet_send(sock, TRUE);
1459 /* If returned -2 could not write to connection now, will do
1465 SILC_LOG_ERROR(("Error sending packet to connection "
1466 "%s:%d [%s]", sock->hostname, sock->port,
1467 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1468 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1469 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1474 /* The packet has been sent and now it is time to set the connection
1475 back to only for input. When there is again some outgoing data
1476 available for this connection it will be set for output as well.
1477 This call clears the output setting and sets it only for input. */
1478 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
1479 SILC_UNSET_OUTBUF_PENDING(sock);
1481 silc_buffer_clear(sock->outbuf);
1485 /* Packet receiving */
1487 /* Read some data from connection */
1488 ret = silc_packet_receive(sock);
1492 SILC_LOG_ERROR(("Error receiving packet from connection "
1493 "%s:%d [%s]", sock->hostname, sock->port,
1494 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1495 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1496 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1503 SILC_LOG_DEBUG(("Read EOF"));
1505 /* If connection is disconnecting already we will finally
1506 close the connection */
1507 if (SILC_IS_DISCONNECTING(sock)) {
1508 if (sock->user_data)
1509 silc_server_free_sock_user_data(server, sock);
1510 silc_server_close_connection(server, sock);
1514 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1515 SILC_SET_DISCONNECTING(sock);
1517 if (sock->user_data)
1518 silc_server_free_sock_user_data(server, sock);
1519 silc_server_close_connection(server, sock);
1523 /* If connection is disconnecting or disconnected we will ignore
1525 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1526 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1530 server->stat.packets_received++;
1532 /* Get keys and stuff from ID entry */
1533 idata = (SilcIDListData)sock->user_data;
1535 cipher = idata->receive_key;
1536 hmac = idata->hmac_receive;
1539 /* Process the packet. This will call the parser that will then
1540 decrypt and parse the packet. */
1541 silc_packet_receive_process(sock, cipher, hmac, silc_server_packet_parse,
1545 /* Callback function that the silc_packet_decrypt will call to make the
1546 decision whether the packet is normal or special packet. We will
1547 return TRUE if it is normal and FALSE if it is special */
1549 static int silc_server_packet_decrypt_check(SilcPacketType packet_type,
1551 SilcPacketContext *packet,
1554 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1555 SilcServer server = (SilcServer)parse_ctx->context;
1557 /* Packet is normal packet, if:
1559 1) packet is private message packet and does not have private key set
1560 2) is other packet than channel message packet
1561 3) is channel message packet and remote is router and we are router
1563 all other packets are special packets
1566 if (packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
1567 (buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY))
1570 if (packet_type != SILC_PACKET_CHANNEL_MESSAGE ||
1571 (packet_type == SILC_PACKET_CHANNEL_MESSAGE &&
1572 parse_ctx->sock->type == SILC_SOCKET_TYPE_ROUTER &&
1573 server->server_type == SILC_ROUTER))
1579 /* Parses whole packet, received earlier. */
1581 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1583 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1584 SilcServer server = (SilcServer)parse_ctx->context;
1585 SilcSocketConnection sock = parse_ctx->sock;
1586 SilcPacketContext *packet = parse_ctx->packet;
1587 SilcIDListData idata = (SilcIDListData)sock->user_data;
1590 SILC_LOG_DEBUG(("Start"));
1592 /* Decrypt the received packet */
1593 ret = silc_packet_decrypt(idata ? idata->receive_key : NULL,
1594 idata ? idata->hmac_receive : NULL,
1595 packet->buffer, packet,
1596 silc_server_packet_decrypt_check, parse_ctx);
1598 SILC_LOG_WARNING(("Packet decryption failed for connection "
1599 "%s:%d [%s]", sock->hostname, sock->port,
1600 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1601 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1602 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1608 /* Parse the packet. Packet type is returned. */
1609 ret = silc_packet_parse(packet);
1611 /* Parse the packet header in special way as this is "special"
1613 ret = silc_packet_parse_special(packet);
1616 /* If entry is disabled ignore what we got. */
1617 if (ret != SILC_PACKET_RESUME_ROUTER &&
1618 idata && idata->status & SILC_IDLIST_STATUS_DISABLED)
1621 if (ret == SILC_PACKET_NONE)
1624 /* Check that the the current client ID is same as in the client's packet. */
1625 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1626 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1627 if (client && client->id) {
1628 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1629 packet->src_id_type);
1630 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
1638 if (server->server_type == SILC_ROUTER) {
1639 /* Route the packet if it is not destined to us. Other ID types but
1640 server are handled separately after processing them. */
1641 if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
1642 packet->dst_id_type == SILC_ID_SERVER &&
1643 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1644 memcmp(packet->dst_id, server->id_string, packet->dst_id_len)) {
1646 /* Route the packet to fastest route for the destination ID */
1647 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1648 packet->dst_id_type);
1651 silc_server_packet_route(server,
1652 silc_server_route_get(server, id,
1653 packet->dst_id_type),
1660 /* Parse the incoming packet type */
1661 silc_server_packet_parse_type(server, sock, packet);
1663 if (server->server_type == SILC_ROUTER) {
1664 /* Broadcast packet if it is marked as broadcast packet and it is
1665 originated from router and we are router. */
1666 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1667 packet->flags & SILC_PACKET_FLAG_BROADCAST &&
1668 !server->standalone) {
1669 /* Broadcast to our primary route */
1670 silc_server_packet_broadcast(server, server->router->connection, packet);
1672 /* If we have backup routers then we need to feed all broadcast
1673 data to those servers. */
1674 silc_server_backup_broadcast(server, sock, packet);
1679 silc_packet_context_free(packet);
1680 silc_free(parse_ctx);
1683 /* Parser callback called by silc_packet_receive_process. This merely
1684 registers timeout that will handle the actual parsing when appropriate. */
1686 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1688 SilcServer server = (SilcServer)parser_context->context;
1689 SilcSocketConnection sock = parser_context->sock;
1691 switch (sock->type) {
1692 case SILC_SOCKET_TYPE_UNKNOWN:
1693 case SILC_SOCKET_TYPE_CLIENT:
1694 /* Parse the packet with timeout */
1695 silc_schedule_task_add(server->schedule, sock->sock,
1696 silc_server_packet_parse_real,
1697 (void *)parser_context, 0, 100000,
1699 SILC_TASK_PRI_NORMAL);
1701 case SILC_SOCKET_TYPE_SERVER:
1702 case SILC_SOCKET_TYPE_ROUTER:
1703 /* Packets from servers are parsed as soon as possible */
1704 silc_schedule_task_add(server->schedule, sock->sock,
1705 silc_server_packet_parse_real,
1706 (void *)parser_context, 0, 1,
1708 SILC_TASK_PRI_NORMAL);
1715 /* Parses the packet type and calls what ever routines the packet type
1716 requires. This is done for all incoming packets. */
1718 void silc_server_packet_parse_type(SilcServer server,
1719 SilcSocketConnection sock,
1720 SilcPacketContext *packet)
1722 SilcPacketType type = packet->type;
1723 SilcIDListData idata = (SilcIDListData)sock->user_data;
1725 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1727 /* Parse the packet type */
1729 case SILC_PACKET_DISCONNECT:
1730 SILC_LOG_DEBUG(("Disconnect packet"));
1731 if (packet->flags & SILC_PACKET_FLAG_LIST)
1735 case SILC_PACKET_SUCCESS:
1737 * Success received for something. For now we can have only
1738 * one protocol for connection executing at once hence this
1739 * success message is for whatever protocol is executing currently.
1741 SILC_LOG_DEBUG(("Success packet"));
1742 if (packet->flags & SILC_PACKET_FLAG_LIST)
1745 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1748 case SILC_PACKET_FAILURE:
1750 * Failure received for something. For now we can have only
1751 * one protocol for connection executing at once hence this
1752 * failure message is for whatever protocol is executing currently.
1754 SILC_LOG_DEBUG(("Failure packet"));
1755 if (packet->flags & SILC_PACKET_FLAG_LIST)
1757 if (sock->protocol) {
1758 SilcServerFailureContext f;
1759 f = silc_calloc(1, sizeof(*f));
1763 /* We will wait 5 seconds to process this failure packet */
1764 silc_schedule_task_add(server->schedule, sock->sock,
1765 silc_server_failure_callback, (void *)f, 5, 0,
1766 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1770 case SILC_PACKET_REJECT:
1771 SILC_LOG_DEBUG(("Reject packet"));
1772 if (packet->flags & SILC_PACKET_FLAG_LIST)
1777 case SILC_PACKET_NOTIFY:
1779 * Received notify packet. Server can receive notify packets from
1780 * router. Server then relays the notify messages to clients if needed.
1782 SILC_LOG_DEBUG(("Notify packet"));
1783 if (packet->flags & SILC_PACKET_FLAG_LIST)
1784 silc_server_notify_list(server, sock, packet);
1786 silc_server_notify(server, sock, packet);
1792 case SILC_PACKET_CHANNEL_MESSAGE:
1794 * Received channel message. Channel messages are special packets
1795 * (although probably most common ones) thus they are handled
1798 SILC_LOG_DEBUG(("Channel Message packet"));
1799 if (packet->flags & SILC_PACKET_FLAG_LIST)
1801 idata->last_receive = time(NULL);
1802 silc_server_channel_message(server, sock, packet);
1805 case SILC_PACKET_CHANNEL_KEY:
1807 * Received key for channel. As channels are created by the router
1808 * the keys are as well. We will distribute the key to all of our
1809 * locally connected clients on the particular channel. Router
1810 * never receives this channel and thus is ignored.
1812 SILC_LOG_DEBUG(("Channel Key packet"));
1813 if (packet->flags & SILC_PACKET_FLAG_LIST)
1815 silc_server_channel_key(server, sock, packet);
1821 case SILC_PACKET_COMMAND:
1823 * Recived command. Processes the command request and allocates the
1824 * command context and calls the command.
1826 SILC_LOG_DEBUG(("Command packet"));
1827 if (packet->flags & SILC_PACKET_FLAG_LIST)
1829 silc_server_command_process(server, sock, packet);
1832 case SILC_PACKET_COMMAND_REPLY:
1834 * Received command reply packet. Received command reply to command. It
1835 * may be reply to command sent by us or reply to command sent by client
1836 * that we've routed further.
1838 SILC_LOG_DEBUG(("Command Reply packet"));
1839 if (packet->flags & SILC_PACKET_FLAG_LIST)
1841 silc_server_command_reply(server, sock, packet);
1845 * Private Message packets
1847 case SILC_PACKET_PRIVATE_MESSAGE:
1849 * Received private message packet. The packet is coming from either
1852 SILC_LOG_DEBUG(("Private Message packet"));
1853 if (packet->flags & SILC_PACKET_FLAG_LIST)
1855 idata->last_receive = time(NULL);
1856 silc_server_private_message(server, sock, packet);
1859 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1861 * Private message key packet.
1863 if (packet->flags & SILC_PACKET_FLAG_LIST)
1865 silc_server_private_message_key(server, sock, packet);
1869 * Key Exchange protocol packets
1871 case SILC_PACKET_KEY_EXCHANGE:
1872 SILC_LOG_DEBUG(("KE packet"));
1873 if (packet->flags & SILC_PACKET_FLAG_LIST)
1876 if (sock->protocol && sock->protocol->protocol &&
1877 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1879 SilcServerKEInternalContext *proto_ctx =
1880 (SilcServerKEInternalContext *)sock->protocol->context;
1882 proto_ctx->packet = silc_packet_context_dup(packet);
1884 /* Let the protocol handle the packet */
1885 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
1887 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1888 "protocol active, packet dropped."));
1892 case SILC_PACKET_KEY_EXCHANGE_1:
1893 SILC_LOG_DEBUG(("KE 1 packet"));
1894 if (packet->flags & SILC_PACKET_FLAG_LIST)
1897 if (sock->protocol && sock->protocol->protocol &&
1898 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1899 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1901 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1902 SilcServerRekeyInternalContext *proto_ctx =
1903 (SilcServerRekeyInternalContext *)sock->protocol->context;
1905 if (proto_ctx->packet)
1906 silc_packet_context_free(proto_ctx->packet);
1908 proto_ctx->packet = silc_packet_context_dup(packet);
1910 /* Let the protocol handle the packet */
1911 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1913 SilcServerKEInternalContext *proto_ctx =
1914 (SilcServerKEInternalContext *)sock->protocol->context;
1916 if (proto_ctx->packet)
1917 silc_packet_context_free(proto_ctx->packet);
1919 proto_ctx->packet = silc_packet_context_dup(packet);
1920 proto_ctx->dest_id_type = packet->src_id_type;
1921 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1922 packet->src_id_type);
1923 if (!proto_ctx->dest_id)
1926 /* Let the protocol handle the packet */
1927 silc_protocol_execute(sock->protocol, server->schedule,
1931 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1932 "protocol active, packet dropped."));
1936 case SILC_PACKET_KEY_EXCHANGE_2:
1937 SILC_LOG_DEBUG(("KE 2 packet"));
1938 if (packet->flags & SILC_PACKET_FLAG_LIST)
1941 if (sock->protocol && sock->protocol->protocol &&
1942 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1943 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1945 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1946 SilcServerRekeyInternalContext *proto_ctx =
1947 (SilcServerRekeyInternalContext *)sock->protocol->context;
1949 if (proto_ctx->packet)
1950 silc_packet_context_free(proto_ctx->packet);
1952 proto_ctx->packet = silc_packet_context_dup(packet);
1954 /* Let the protocol handle the packet */
1955 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1957 SilcServerKEInternalContext *proto_ctx =
1958 (SilcServerKEInternalContext *)sock->protocol->context;
1960 if (proto_ctx->packet)
1961 silc_packet_context_free(proto_ctx->packet);
1963 proto_ctx->packet = silc_packet_context_dup(packet);
1964 proto_ctx->dest_id_type = packet->src_id_type;
1965 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1966 packet->src_id_type);
1967 if (!proto_ctx->dest_id)
1970 /* Let the protocol handle the packet */
1971 silc_protocol_execute(sock->protocol, server->schedule,
1975 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1976 "protocol active, packet dropped."));
1980 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1982 * Connection authentication request packet. When we receive this packet
1983 * we will send to the other end information about our mandatory
1984 * authentication method for the connection. This packet maybe received
1987 SILC_LOG_DEBUG(("Connection authentication request packet"));
1988 if (packet->flags & SILC_PACKET_FLAG_LIST)
1990 silc_server_connection_auth_request(server, sock, packet);
1994 * Connection Authentication protocol packets
1996 case SILC_PACKET_CONNECTION_AUTH:
1997 /* Start of the authentication protocol. We receive here the
1998 authentication data and will verify it. */
1999 SILC_LOG_DEBUG(("Connection auth packet"));
2000 if (packet->flags & SILC_PACKET_FLAG_LIST)
2003 if (sock->protocol && sock->protocol->protocol->type
2004 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2006 SilcServerConnAuthInternalContext *proto_ctx =
2007 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2009 proto_ctx->packet = silc_packet_context_dup(packet);
2011 /* Let the protocol handle the packet */
2012 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2014 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2015 "protocol active, packet dropped."));
2019 case SILC_PACKET_NEW_ID:
2021 * Received New ID packet. This includes some new ID that has been
2022 * created. It may be for client, server or channel. This is the way
2023 * to distribute information about new registered entities in the
2026 SILC_LOG_DEBUG(("New ID packet"));
2027 if (packet->flags & SILC_PACKET_FLAG_LIST)
2028 silc_server_new_id_list(server, sock, packet);
2030 silc_server_new_id(server, sock, packet);
2033 case SILC_PACKET_NEW_CLIENT:
2035 * Received new client packet. This includes client information that
2036 * we will use to create initial client ID. After creating new
2037 * ID we will send it to the client.
2039 SILC_LOG_DEBUG(("New Client packet"));
2040 if (packet->flags & SILC_PACKET_FLAG_LIST)
2042 silc_server_new_client(server, sock, packet);
2045 case SILC_PACKET_NEW_SERVER:
2047 * Received new server packet. This includes Server ID and some other
2048 * information that we may save. This is received after server has
2051 SILC_LOG_DEBUG(("New Server packet"));
2052 if (packet->flags & SILC_PACKET_FLAG_LIST)
2054 silc_server_new_server(server, sock, packet);
2057 case SILC_PACKET_NEW_CHANNEL:
2059 * Received new channel packet. Information about new channel in the
2060 * network are distributed using this packet.
2062 SILC_LOG_DEBUG(("New Channel packet"));
2063 if (packet->flags & SILC_PACKET_FLAG_LIST)
2064 silc_server_new_channel_list(server, sock, packet);
2066 silc_server_new_channel(server, sock, packet);
2069 case SILC_PACKET_HEARTBEAT:
2071 * Received heartbeat.
2073 SILC_LOG_DEBUG(("Heartbeat packet"));
2074 if (packet->flags & SILC_PACKET_FLAG_LIST)
2078 case SILC_PACKET_KEY_AGREEMENT:
2080 * Received heartbeat.
2082 SILC_LOG_DEBUG(("Key agreement packet"));
2083 if (packet->flags & SILC_PACKET_FLAG_LIST)
2085 silc_server_key_agreement(server, sock, packet);
2088 case SILC_PACKET_REKEY:
2090 * Received re-key packet. The sender wants to regenerate the session
2093 SILC_LOG_DEBUG(("Re-key packet"));
2094 if (packet->flags & SILC_PACKET_FLAG_LIST)
2096 silc_server_rekey(server, sock, packet);
2099 case SILC_PACKET_REKEY_DONE:
2101 * The re-key is done.
2103 SILC_LOG_DEBUG(("Re-key done packet"));
2104 if (packet->flags & SILC_PACKET_FLAG_LIST)
2107 if (sock->protocol && sock->protocol->protocol &&
2108 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2110 SilcServerRekeyInternalContext *proto_ctx =
2111 (SilcServerRekeyInternalContext *)sock->protocol->context;
2113 if (proto_ctx->packet)
2114 silc_packet_context_free(proto_ctx->packet);
2116 proto_ctx->packet = silc_packet_context_dup(packet);
2118 /* Let the protocol handle the packet */
2119 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2121 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2122 "protocol active, packet dropped."));
2126 case SILC_PACKET_FTP:
2130 case SILC_PACKET_RESUME_ROUTER:
2131 /* Resume router packet received. This packet is received for backup
2132 router resuming protocol. */
2133 SILC_LOG_DEBUG(("Resume router packet"));
2134 if (packet->flags & SILC_PACKET_FLAG_LIST)
2136 silc_server_backup_resume_router(server, sock, packet);
2140 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2146 /* Creates connection to a remote router. */
2148 void silc_server_create_connection(SilcServer server,
2149 char *remote_host, uint32 port)
2151 SilcServerConnection sconn;
2153 /* Allocate connection object for hold connection specific stuff. */
2154 sconn = silc_calloc(1, sizeof(*sconn));
2155 sconn->server = server;
2156 sconn->remote_host = strdup(remote_host);
2157 sconn->remote_port = port;
2159 silc_schedule_task_add(server->schedule, 0,
2160 silc_server_connect_router,
2161 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2162 SILC_TASK_PRI_NORMAL);
2165 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2167 silc_socket_free((SilcSocketConnection)context);
2170 /* Closes connection to socket connection */
2172 void silc_server_close_connection(SilcServer server,
2173 SilcSocketConnection sock)
2175 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2177 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2178 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2179 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2182 /* We won't listen for this connection anymore */
2183 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2185 /* Unregister all tasks */
2186 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2188 /* Close the actual connection */
2189 silc_net_close_connection(sock->sock);
2190 server->sockets[sock->sock] = NULL;
2192 /* If sock->user_data is NULL then we'll check for active protocols
2193 here since the silc_server_free_sock_user_data has not been called
2194 for this connection. */
2195 if (!sock->user_data) {
2196 /* If any protocol is active cancel its execution. It will call
2197 the final callback which will finalize the disconnection. */
2198 if (sock->protocol) {
2199 silc_protocol_cancel(sock->protocol, server->schedule);
2200 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2201 silc_protocol_execute_final(sock->protocol, server->schedule);
2202 sock->protocol = NULL;
2207 silc_schedule_task_add(server->schedule, 0,
2208 silc_server_close_connection_final,
2209 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2210 SILC_TASK_PRI_NORMAL);
2213 /* Sends disconnect message to remote connection and disconnects the
2216 void silc_server_disconnect_remote(SilcServer server,
2217 SilcSocketConnection sock,
2218 const char *fmt, ...)
2221 unsigned char buf[4096];
2226 memset(buf, 0, sizeof(buf));
2228 vsprintf(buf, fmt, ap);
2231 SILC_LOG_DEBUG(("Disconnecting remote host"));
2233 /* Notify remote end that the conversation is over. The notify message
2234 is tried to be sent immediately. */
2235 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2236 buf, strlen(buf), TRUE);
2238 /* Mark the connection to be disconnected */
2239 SILC_SET_DISCONNECTED(sock);
2240 silc_server_close_connection(server, sock);
2245 SilcClientEntry client;
2246 } *FreeClientInternal;
2248 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2250 FreeClientInternal i = (FreeClientInternal)context;
2252 silc_idlist_del_data(i->client);
2253 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2257 /* Frees client data and notifies about client's signoff. */
2259 void silc_server_free_client_data(SilcServer server,
2260 SilcSocketConnection sock,
2261 SilcClientEntry client,
2265 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2267 /* If there is pending outgoing data for the client then purge it
2268 to the network before removing the client entry. */
2269 silc_server_packet_queue_purge(server, sock);
2271 /* Send SIGNOFF notify to routers. */
2272 if (notify && !server->standalone && server->router)
2273 silc_server_send_notify_signoff(server, server->router->connection,
2274 server->server_type == SILC_SERVER ?
2275 FALSE : TRUE, client->id, signoff);
2277 /* Remove client from all channels */
2279 silc_server_remove_from_channels(server, NULL, client,
2280 TRUE, signoff, TRUE);
2282 silc_server_remove_from_channels(server, NULL, client,
2283 FALSE, NULL, FALSE);
2285 /* We will not delete the client entry right away. We will take it
2286 into history (for WHOWAS command) for 5 minutes */
2289 silc_schedule_task_add(server->schedule, 0,
2290 silc_server_free_client_data_timeout,
2292 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2293 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2294 client->router = NULL;
2295 client->connection = NULL;
2297 /* Free the client entry and everything in it */
2298 server->stat.my_clients--;
2299 server->stat.clients--;
2300 if (server->server_type == SILC_ROUTER)
2301 server->stat.cell_clients--;
2304 /* Frees user_data pointer from socket connection object. This also sends
2305 appropriate notify packets to the network to inform about leaving
2308 void silc_server_free_sock_user_data(SilcServer server,
2309 SilcSocketConnection sock)
2311 SILC_LOG_DEBUG(("Start"));
2313 switch (sock->type) {
2314 case SILC_SOCKET_TYPE_CLIENT:
2316 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2317 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2320 case SILC_SOCKET_TYPE_SERVER:
2321 case SILC_SOCKET_TYPE_ROUTER:
2323 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2324 SilcServerEntry backup_router = NULL;
2326 /* If this was our primary router connection then we're lost to
2327 the outside world. */
2328 if (server->router == user_data) {
2329 backup_router = silc_server_backup_get(server);
2331 /* Check whether we have a backup router connection */
2332 if (!backup_router || backup_router == user_data) {
2333 silc_schedule_task_add(server->schedule, 0,
2334 silc_server_connect_to_router,
2337 SILC_TASK_PRI_NORMAL);
2339 server->id_entry->router = NULL;
2340 server->router = NULL;
2341 server->standalone = TRUE;
2342 backup_router = NULL;
2344 SILC_LOG_INFO(("New primary router is backup router %s",
2345 backup_router->server_name));
2346 SILC_LOG_DEBUG(("New primary router is backup router %s",
2347 backup_router->server_name));
2348 server->id_entry->router = backup_router;
2349 server->router = backup_router;
2350 server->router_connect = time(0);
2351 if (server->server_type == SILC_BACKUP_ROUTER) {
2352 server->server_type = SILC_ROUTER;
2354 /* We'll need to constantly try to reconnect to the primary
2355 router so that we'll see when it comes back online. */
2356 silc_server_backup_reconnect(server, sock->ip, sock->port,
2357 silc_server_backup_connected,
2361 /* Mark this connection as replaced */
2362 silc_server_backup_replaced_add(server, user_data->id,
2367 if (!backup_router) {
2368 /* Free all client entries that this server owns as they will
2369 become invalid now as well. */
2371 silc_server_remove_clients_by_server(server, user_data, TRUE);
2373 /* Update the client entries of this server to the new backup
2374 router. This also removes the clients that *really* was owned
2375 by the primary router and went down with the router. */
2376 silc_server_update_clients_by_server(server, user_data, backup_router,
2380 /* Free the server entry */
2381 silc_server_backup_del(server, user_data);
2382 silc_server_backup_replaced_del(server, user_data);
2383 silc_idlist_del_data(user_data);
2384 silc_idlist_del_server(server->local_list, user_data);
2385 server->stat.my_servers--;
2386 server->stat.servers--;
2387 if (server->server_type == SILC_ROUTER)
2388 server->stat.cell_servers--;
2390 if (backup_router) {
2391 /* Announce all of our stuff that was created about 5 minutes ago.
2392 The backup router knows all the other stuff already. */
2393 if (server->server_type == SILC_ROUTER)
2394 silc_server_announce_servers(server, FALSE, time(0) - 300,
2395 server->router->connection);
2397 /* Announce our clients and channels to the router */
2398 silc_server_announce_clients(server, time(0) - 300,
2399 server->router->connection);
2400 silc_server_announce_channels(server, time(0) - 300,
2401 server->router->connection);
2407 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2409 silc_idlist_del_data(user_data);
2410 silc_free(user_data);
2415 /* If any protocol is active cancel its execution */
2416 if (sock->protocol) {
2417 silc_protocol_cancel(sock->protocol, server->schedule);
2418 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2419 silc_protocol_execute_final(sock->protocol, server->schedule);
2420 sock->protocol = NULL;
2423 sock->user_data = NULL;
2426 /* Removes client from all channels it has joined. This is used when client
2427 connection is disconnected. If the client on a channel is last, the
2428 channel is removed as well. This sends the SIGNOFF notify types. */
2430 void silc_server_remove_from_channels(SilcServer server,
2431 SilcSocketConnection sock,
2432 SilcClientEntry client,
2434 char *signoff_message,
2437 SilcChannelEntry channel;
2438 SilcChannelClientEntry chl;
2439 SilcHashTableList htl;
2442 SILC_LOG_DEBUG(("Start"));
2444 if (!client || !client->id)
2447 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2449 /* Remove the client from all channels. The client is removed from
2450 the channels' user list. */
2451 silc_hash_table_list(client->channels, &htl);
2452 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2453 channel = chl->channel;
2455 /* Remove channel from client's channel list */
2456 silc_hash_table_del(client->channels, channel);
2458 /* Remove channel if there is no users anymore */
2459 if (server->server_type == SILC_ROUTER &&
2460 silc_hash_table_count(channel->user_list) < 2) {
2462 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2463 if (!silc_idlist_del_channel(server->local_list, channel))
2464 silc_idlist_del_channel(server->global_list, channel);
2465 server->stat.my_channels--;
2469 /* Remove client from channel's client list */
2470 silc_hash_table_del(channel->user_list, chl->client);
2472 /* If there is no global users on the channel anymore mark the channel
2473 as local channel. Do not check if the removed client is local client. */
2474 if (server->server_type != SILC_ROUTER && channel->global_users &&
2475 chl->client->router && !silc_server_channel_has_global(channel))
2476 channel->global_users = FALSE;
2479 server->stat.my_chanclients--;
2481 /* If there is not at least one local user on the channel then we don't
2482 need the channel entry anymore, we can remove it safely. */
2483 if (server->server_type != SILC_ROUTER &&
2484 !silc_server_channel_has_local(channel)) {
2485 /* Notify about leaving client if this channel has global users. */
2486 if (notify && channel->global_users)
2487 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2488 SILC_NOTIFY_TYPE_SIGNOFF,
2489 signoff_message ? 2 : 1,
2490 clidp->data, clidp->len,
2491 signoff_message, signoff_message ?
2492 strlen(signoff_message) : 0);
2495 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2497 if (channel->founder_key) {
2498 /* The founder auth data exists, do not remove the channel entry */
2499 SilcChannelClientEntry chl2;
2500 SilcHashTableList htl2;
2504 silc_hash_table_list(channel->user_list, &htl2);
2505 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2506 silc_hash_table_del(chl2->client->channels, channel);
2507 silc_hash_table_del(channel->user_list, chl2->client);
2513 /* Remove the channel entry */
2514 if (!silc_idlist_del_channel(server->local_list, channel))
2515 silc_idlist_del_channel(server->global_list, channel);
2516 server->stat.my_channels--;
2520 /* Send notify to channel about client leaving SILC and thus
2521 the entire channel. */
2523 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2524 SILC_NOTIFY_TYPE_SIGNOFF,
2525 signoff_message ? 2 : 1,
2526 clidp->data, clidp->len,
2527 signoff_message, signoff_message ?
2528 strlen(signoff_message) : 0);
2530 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2531 /* Re-generate channel key */
2532 if (!silc_server_create_channel_key(server, channel, 0))
2535 /* Send the channel key to the channel. The key of course is not sent
2536 to the client who was removed from the channel. */
2537 silc_server_send_channel_key(server, client->connection, channel,
2538 server->server_type == SILC_ROUTER ?
2539 FALSE : !server->standalone);
2543 silc_buffer_free(clidp);
2546 /* Removes client from one channel. This is used for example when client
2547 calls LEAVE command to remove itself from the channel. Returns TRUE
2548 if channel still exists and FALSE if the channel is removed when
2549 last client leaves the channel. If `notify' is FALSE notify messages
2552 int silc_server_remove_from_one_channel(SilcServer server,
2553 SilcSocketConnection sock,
2554 SilcChannelEntry channel,
2555 SilcClientEntry client,
2558 SilcChannelClientEntry chl;
2561 SILC_LOG_DEBUG(("Start"));
2563 /* Get the entry to the channel, if this client is not on the channel
2565 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
2568 /* Remove the client from the channel. The client is removed from
2569 the channel's user list. */
2571 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2573 /* Remove channel from client's channel list */
2574 silc_hash_table_del(client->channels, chl->channel);
2576 /* Remove channel if there is no users anymore */
2577 if (server->server_type == SILC_ROUTER &&
2578 silc_hash_table_count(channel->user_list) < 2) {
2580 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2581 if (!silc_idlist_del_channel(server->local_list, channel))
2582 silc_idlist_del_channel(server->global_list, channel);
2583 silc_buffer_free(clidp);
2584 server->stat.my_channels--;
2588 /* Remove client from channel's client list */
2589 silc_hash_table_del(channel->user_list, chl->client);
2591 /* If there is no global users on the channel anymore mark the channel
2592 as local channel. Do not check if the client is local client. */
2593 if (server->server_type != SILC_ROUTER && channel->global_users &&
2594 chl->client->router && !silc_server_channel_has_global(channel))
2595 channel->global_users = FALSE;
2598 server->stat.my_chanclients--;
2600 /* If there is not at least one local user on the channel then we don't
2601 need the channel entry anymore, we can remove it safely. */
2602 if (server->server_type != SILC_ROUTER &&
2603 !silc_server_channel_has_local(channel)) {
2604 /* Notify about leaving client if this channel has global users. */
2605 if (notify && channel->global_users)
2606 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2607 SILC_NOTIFY_TYPE_LEAVE, 1,
2608 clidp->data, clidp->len);
2610 silc_buffer_free(clidp);
2613 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2615 if (channel->founder_key) {
2616 /* The founder auth data exists, do not remove the channel entry */
2617 SilcChannelClientEntry chl2;
2618 SilcHashTableList htl2;
2622 silc_hash_table_list(channel->user_list, &htl2);
2623 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2624 silc_hash_table_del(chl2->client->channels, channel);
2625 silc_hash_table_del(channel->user_list, chl2->client);
2631 /* Remove the channel entry */
2632 if (!silc_idlist_del_channel(server->local_list, channel))
2633 silc_idlist_del_channel(server->global_list, channel);
2634 server->stat.my_channels--;
2638 /* Send notify to channel about client leaving the channel */
2640 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2641 SILC_NOTIFY_TYPE_LEAVE, 1,
2642 clidp->data, clidp->len);
2644 silc_buffer_free(clidp);
2648 /* Timeout callback. This is called if connection is idle or for some
2649 other reason is not responding within some period of time. This
2650 disconnects the remote end. */
2652 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2654 SilcServer server = (SilcServer)context;
2655 SilcSocketConnection sock = server->sockets[fd];
2657 SILC_LOG_DEBUG(("Start"));
2662 /* If we have protocol active we must assure that we call the protocol's
2663 final callback so that all the memory is freed. */
2664 if (sock->protocol) {
2665 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2666 silc_protocol_execute_final(sock->protocol, server->schedule);
2670 if (sock->user_data)
2671 silc_server_free_sock_user_data(server, sock);
2673 silc_server_disconnect_remote(server, sock, "Server closed connection: "
2674 "Connection timeout");
2677 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2678 function may be used only by router. In real SILC network all channels
2679 are created by routers thus this function is never used by normal
2682 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2683 SilcServerID *router_id,
2689 SilcChannelID *channel_id;
2690 SilcChannelEntry entry;
2694 SILC_LOG_DEBUG(("Creating new channel"));
2697 cipher = SILC_DEFAULT_CIPHER;
2699 hmac = SILC_DEFAULT_HMAC;
2701 /* Allocate cipher */
2702 if (!silc_cipher_alloc(cipher, &key))
2706 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2707 silc_cipher_free(key);
2711 channel_name = strdup(channel_name);
2713 /* Create the channel */
2714 if (!silc_id_create_channel_id(server, router_id, server->rng,
2716 silc_free(channel_name);
2717 silc_cipher_free(key);
2718 silc_hmac_free(newhmac);
2721 entry = silc_idlist_add_channel(server->local_list, channel_name,
2722 SILC_CHANNEL_MODE_NONE, channel_id,
2723 NULL, key, newhmac);
2725 silc_free(channel_name);
2726 silc_cipher_free(key);
2727 silc_hmac_free(newhmac);
2731 entry->cipher = strdup(cipher);
2732 entry->hmac_name = strdup(hmac);
2734 /* Now create the actual key material */
2735 if (!silc_server_create_channel_key(server, entry,
2736 silc_cipher_get_key_len(key) / 8)) {
2737 silc_free(channel_name);
2738 silc_cipher_free(key);
2739 silc_hmac_free(newhmac);
2740 silc_free(entry->cipher);
2741 silc_free(entry->hmac_name);
2745 /* Notify other routers about the new channel. We send the packet
2746 to our primary route. */
2747 if (broadcast && server->standalone == FALSE)
2748 silc_server_send_new_channel(server, server->router->connection, TRUE,
2749 channel_name, entry->id,
2750 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2753 server->stat.my_channels++;
2758 /* Same as above but creates the channel with Channel ID `channel_id. */
2761 silc_server_create_new_channel_with_id(SilcServer server,
2765 SilcChannelID *channel_id,
2768 SilcChannelEntry entry;
2772 SILC_LOG_DEBUG(("Creating new channel"));
2775 cipher = SILC_DEFAULT_CIPHER;
2777 hmac = SILC_DEFAULT_HMAC;
2779 /* Allocate cipher */
2780 if (!silc_cipher_alloc(cipher, &key))
2784 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2785 silc_cipher_free(key);
2789 channel_name = strdup(channel_name);
2791 /* Create the channel */
2792 entry = silc_idlist_add_channel(server->local_list, channel_name,
2793 SILC_CHANNEL_MODE_NONE, channel_id,
2794 NULL, key, newhmac);
2796 silc_free(channel_name);
2800 /* Now create the actual key material */
2801 if (!silc_server_create_channel_key(server, entry,
2802 silc_cipher_get_key_len(key) / 8)) {
2803 silc_free(channel_name);
2807 /* Notify other routers about the new channel. We send the packet
2808 to our primary route. */
2809 if (broadcast && server->standalone == FALSE)
2810 silc_server_send_new_channel(server, server->router->connection, TRUE,
2811 channel_name, entry->id,
2812 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2815 server->stat.my_channels++;
2820 /* Channel's key re-key timeout callback. */
2822 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2824 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2825 SilcServer server = (SilcServer)rekey->context;
2829 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
2832 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
2835 /* Generates new channel key. This is used to create the initial channel key
2836 but also to re-generate new key for channel. If `key_len' is provided
2837 it is the bytes of the key length. */
2839 bool silc_server_create_channel_key(SilcServer server,
2840 SilcChannelEntry channel,
2844 unsigned char channel_key[32], hash[32];
2847 SILC_LOG_DEBUG(("Generating channel key"));
2849 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2850 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2854 if (!channel->channel_key)
2855 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key))
2860 else if (channel->key_len)
2861 len = channel->key_len / 8;
2863 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2865 /* Create channel key */
2866 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2869 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2871 /* Remove old key if exists */
2873 memset(channel->key, 0, channel->key_len / 8);
2874 silc_free(channel->key);
2878 channel->key_len = len * 8;
2879 channel->key = silc_calloc(len, sizeof(*channel->key));
2880 memcpy(channel->key, channel_key, len);
2881 memset(channel_key, 0, sizeof(channel_key));
2883 /* Generate HMAC key from the channel key data and set it */
2885 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
2886 silc_hash_make(channel->hmac->hash, channel->key, len, hash);
2887 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2888 memset(hash, 0, sizeof(hash));
2890 if (server->server_type == SILC_ROUTER) {
2891 if (!channel->rekey)
2892 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2893 channel->rekey->context = (void *)server;
2894 channel->rekey->channel = channel;
2895 channel->rekey->key_len = key_len;
2896 if (channel->rekey->task)
2897 silc_schedule_task_del(server->schedule, channel->rekey->task);
2899 channel->rekey->task =
2900 silc_schedule_task_add(server->schedule, 0,
2901 silc_server_channel_key_rekey,
2902 (void *)channel->rekey, 3600, 0,
2904 SILC_TASK_PRI_NORMAL);
2910 /* Saves the channel key found in the encoded `key_payload' buffer. This
2911 function is used when we receive Channel Key Payload and also when we're
2912 processing JOIN command reply. Returns entry to the channel. */
2914 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2915 SilcBuffer key_payload,
2916 SilcChannelEntry channel)
2918 SilcChannelKeyPayload payload = NULL;
2919 SilcChannelID *id = NULL;
2920 unsigned char *tmp, hash[32];
2924 SILC_LOG_DEBUG(("Start"));
2926 /* Decode channel key payload */
2927 payload = silc_channel_key_payload_parse(key_payload);
2929 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2934 /* Get the channel entry */
2937 /* Get channel ID */
2938 tmp = silc_channel_key_get_id(payload, &tmp_len);
2939 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2945 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2947 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2949 SILC_LOG_ERROR(("Received key for non-existent channel"));
2955 tmp = silc_channel_key_get_key(payload, &tmp_len);
2961 cipher = silc_channel_key_get_cipher(payload, NULL);
2967 /* Remove old key if exists */
2969 memset(channel->key, 0, channel->key_len / 8);
2970 silc_free(channel->key);
2971 silc_cipher_free(channel->channel_key);
2974 /* Create new cipher */
2975 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
2980 if (channel->cipher)
2981 silc_free(channel->cipher);
2982 channel->cipher = strdup(cipher);
2985 channel->key_len = tmp_len * 8;
2986 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
2987 memcpy(channel->key, tmp, tmp_len);
2988 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
2990 /* Generate HMAC key from the channel key data and set it */
2992 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
2993 silc_hash_make(channel->hmac->hash, tmp, tmp_len, hash);
2994 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2996 memset(hash, 0, sizeof(hash));
2997 memset(tmp, 0, tmp_len);
2999 if (server->server_type == SILC_ROUTER) {
3000 if (!channel->rekey)
3001 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3002 channel->rekey->context = (void *)server;
3003 channel->rekey->channel = channel;
3004 if (channel->rekey->task)
3005 silc_schedule_task_del(server->schedule, channel->rekey->task);
3007 channel->rekey->task =
3008 silc_schedule_task_add(server->schedule, 0,
3009 silc_server_channel_key_rekey,
3010 (void *)channel->rekey, 3600, 0,
3012 SILC_TASK_PRI_NORMAL);
3018 silc_channel_key_payload_free(payload);
3023 /* Heartbeat callback. This function is set as argument for the
3024 silc_socket_set_heartbeat function. The library will call this function
3025 at the set time interval. */
3027 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3030 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3032 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3035 /* Send the heartbeat */
3036 silc_server_send_heartbeat(hb->server, sock);
3039 /* Returns assembled of all servers in the given ID list. The packet's
3040 form is dictated by the New ID payload. */
3042 static void silc_server_announce_get_servers(SilcServer server,
3043 SilcServerEntry remote,
3045 SilcBuffer *servers,
3046 unsigned long creation_time)
3048 SilcIDCacheList list;
3049 SilcIDCacheEntry id_cache;
3050 SilcServerEntry entry;
3053 /* Go through all clients in the list */
3054 if (silc_idcache_get_all(id_list->servers, &list)) {
3055 if (silc_idcache_list_first(list, &id_cache)) {
3057 entry = (SilcServerEntry)id_cache->context;
3059 /* Do not announce the one we've sending our announcements and
3060 do not announce ourself. Also check the creation time if it's
3062 if ((entry == remote) || (entry == server->id_entry) ||
3063 (creation_time && entry->data.created < creation_time)) {
3064 if (!silc_idcache_list_next(list, &id_cache))
3069 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3071 *servers = silc_buffer_realloc(*servers,
3073 (*servers)->truelen + idp->len :
3075 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3076 silc_buffer_put(*servers, idp->data, idp->len);
3077 silc_buffer_pull(*servers, idp->len);
3078 silc_buffer_free(idp);
3080 if (!silc_idcache_list_next(list, &id_cache))
3085 silc_idcache_list_free(list);
3089 /* This function is used by router to announce existing servers to our
3090 primary router when we've connected to it. If `creation_time' is non-zero
3091 then only the servers that has been created after the `creation_time'
3092 will be announced. */
3094 void silc_server_announce_servers(SilcServer server, bool global,
3095 unsigned long creation_time,
3096 SilcSocketConnection remote)
3098 SilcBuffer servers = NULL;
3100 SILC_LOG_DEBUG(("Announcing servers"));
3102 /* Get servers in local list */
3103 silc_server_announce_get_servers(server, remote->user_data,
3104 server->local_list, &servers,
3108 /* Get servers in global list */
3109 silc_server_announce_get_servers(server, remote->user_data,
3110 server->global_list, &servers,
3114 silc_buffer_push(servers, servers->data - servers->head);
3115 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3117 /* Send the packet */
3118 silc_server_packet_send(server, remote,
3119 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3120 servers->data, servers->len, TRUE);
3122 silc_buffer_free(servers);
3126 /* Returns assembled packet of all clients in the given ID list. The
3127 packet's form is dictated by the New ID Payload. */
3129 static void silc_server_announce_get_clients(SilcServer server,
3131 SilcBuffer *clients,
3132 unsigned long creation_time)
3134 SilcIDCacheList list;
3135 SilcIDCacheEntry id_cache;
3136 SilcClientEntry client;
3139 /* Go through all clients in the list */
3140 if (silc_idcache_get_all(id_list->clients, &list)) {
3141 if (silc_idcache_list_first(list, &id_cache)) {
3143 client = (SilcClientEntry)id_cache->context;
3145 if (creation_time && client->data.created < creation_time) {
3146 if (!silc_idcache_list_next(list, &id_cache))
3151 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3153 *clients = silc_buffer_realloc(*clients,
3155 (*clients)->truelen + idp->len :
3157 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3158 silc_buffer_put(*clients, idp->data, idp->len);
3159 silc_buffer_pull(*clients, idp->len);
3160 silc_buffer_free(idp);
3162 if (!silc_idcache_list_next(list, &id_cache))
3167 silc_idcache_list_free(list);
3171 /* This function is used to announce our existing clients to our router
3172 when we've connected to it. If `creation_time' is non-zero then only
3173 the clients that has been created after the `creation_time' will be
3176 void silc_server_announce_clients(SilcServer server,
3177 unsigned long creation_time,
3178 SilcSocketConnection remote)
3180 SilcBuffer clients = NULL;
3182 SILC_LOG_DEBUG(("Announcing clients"));
3184 /* Get clients in local list */
3185 silc_server_announce_get_clients(server, server->local_list,
3186 &clients, creation_time);
3188 /* As router we announce our global list as well */
3189 if (server->server_type == SILC_ROUTER)
3190 silc_server_announce_get_clients(server, server->global_list,
3191 &clients, creation_time);
3194 silc_buffer_push(clients, clients->data - clients->head);
3195 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3197 /* Send the packet */
3198 silc_server_packet_send(server, remote,
3199 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3200 clients->data, clients->len, TRUE);
3202 silc_buffer_free(clients);
3207 silc_server_announce_encode_notify(SilcNotifyType notify, uint32 argc, ...)
3213 p = silc_notify_payload_encode(notify, argc, ap);
3219 /* Returns assembled packets for channel users of the `channel'. */
3221 void silc_server_announce_get_channel_users(SilcServer server,
3222 SilcChannelEntry channel,
3223 SilcBuffer *channel_users,
3224 SilcBuffer *channel_users_modes)
3226 SilcChannelClientEntry chl;
3227 SilcHashTableList htl;
3228 SilcBuffer chidp, clidp;
3231 unsigned char mode[4];
3233 SILC_LOG_DEBUG(("Start"));
3235 /* Now find all users on the channel */
3236 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3237 silc_hash_table_list(channel->user_list, &htl);
3238 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3239 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3242 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3243 clidp->data, clidp->len,
3244 chidp->data, chidp->len);
3247 silc_buffer_realloc(*channel_users,
3249 (*channel_users)->truelen + len : len));
3250 silc_buffer_pull_tail(*channel_users,
3251 ((*channel_users)->end -
3252 (*channel_users)->data));
3254 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3255 silc_buffer_pull(*channel_users, len);
3256 silc_buffer_free(tmp);
3258 /* CUMODE notify for mode change on the channel */
3259 SILC_PUT32_MSB(chl->mode, mode);
3260 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3261 3, clidp->data, clidp->len,
3263 clidp->data, clidp->len);
3265 *channel_users_modes =
3266 silc_buffer_realloc(*channel_users_modes,
3267 (*channel_users_modes ?
3268 (*channel_users_modes)->truelen + len : len));
3269 silc_buffer_pull_tail(*channel_users_modes,
3270 ((*channel_users_modes)->end -
3271 (*channel_users_modes)->data));
3273 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3274 silc_buffer_pull(*channel_users_modes, len);
3275 silc_buffer_free(tmp);
3277 silc_buffer_free(clidp);
3279 silc_buffer_free(chidp);
3282 /* Returns assembled packets for all channels and users on those channels
3283 from the given ID List. The packets are in the form dictated by the
3284 New Channel and New Channel User payloads. */
3286 void silc_server_announce_get_channels(SilcServer server,
3288 SilcBuffer *channels,
3289 SilcBuffer *channel_users,
3290 SilcBuffer **channel_users_modes,
3291 uint32 *channel_users_modes_c,
3292 SilcChannelID ***channel_ids,
3293 unsigned long creation_time)
3295 SilcIDCacheList list;
3296 SilcIDCacheEntry id_cache;
3297 SilcChannelEntry channel;
3302 int i = *channel_users_modes_c;
3305 SILC_LOG_DEBUG(("Start"));
3307 /* Go through all channels in the list */
3308 if (silc_idcache_get_all(id_list->channels, &list)) {
3309 if (silc_idcache_list_first(list, &id_cache)) {
3311 channel = (SilcChannelEntry)id_cache->context;
3313 if (creation_time && channel->created < creation_time)
3318 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3319 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3320 name_len = strlen(channel->channel_name);
3323 len = 4 + name_len + id_len + 4;
3325 silc_buffer_realloc(*channels,
3326 (*channels ? (*channels)->truelen +
3328 silc_buffer_pull_tail(*channels,
3329 ((*channels)->end - (*channels)->data));
3330 silc_buffer_format(*channels,
3331 SILC_STR_UI_SHORT(name_len),
3332 SILC_STR_UI_XNSTRING(channel->channel_name,
3334 SILC_STR_UI_SHORT(id_len),
3335 SILC_STR_UI_XNSTRING(cid, id_len),
3336 SILC_STR_UI_INT(channel->mode),
3338 silc_buffer_pull(*channels, len);
3341 *channel_users_modes = silc_realloc(*channel_users_modes,
3342 sizeof(**channel_users_modes) *
3344 (*channel_users_modes)[i] = NULL;
3345 *channel_ids = silc_realloc(*channel_ids,
3346 sizeof(**channel_ids) * (i + 1));
3347 (*channel_ids)[i] = NULL;
3348 silc_server_announce_get_channel_users(server, channel,
3350 channel_users_modes[i]);
3351 (*channel_ids)[i] = channel->id;
3354 if (!silc_idcache_list_next(list, &id_cache))
3358 *channel_users_modes_c += i;
3361 silc_idcache_list_free(list);
3365 /* This function is used to announce our existing channels to our router
3366 when we've connected to it. This also announces the users on the
3367 channels to the router. If the `creation_time' is non-zero only the
3368 channels that was created after the `creation_time' are announced.
3369 Note that the channel users are still announced even if the `creation_time'
3372 void silc_server_announce_channels(SilcServer server,
3373 unsigned long creation_time,
3374 SilcSocketConnection remote)
3376 SilcBuffer channels = NULL, channel_users = NULL;
3377 SilcBuffer *channel_users_modes = NULL;
3378 uint32 channel_users_modes_c = 0;
3379 SilcChannelID **channel_ids = NULL;
3381 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3383 /* Get channels and channel users in local list */
3384 silc_server_announce_get_channels(server, server->local_list,
3385 &channels, &channel_users,
3386 &channel_users_modes,
3387 &channel_users_modes_c,
3388 &channel_ids, creation_time);
3390 /* Get channels and channel users in global list */
3391 silc_server_announce_get_channels(server, server->global_list,
3392 &channels, &channel_users,
3393 &channel_users_modes,
3394 &channel_users_modes_c,
3395 &channel_ids, creation_time);
3398 silc_buffer_push(channels, channels->data - channels->head);
3399 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3401 /* Send the packet */
3402 silc_server_packet_send(server, remote,
3403 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3404 channels->data, channels->len,
3407 silc_buffer_free(channels);
3410 if (channel_users) {
3411 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3412 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3413 channel_users->len);
3415 /* Send the packet */
3416 silc_server_packet_send(server, remote,
3417 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3418 channel_users->data, channel_users->len,
3421 silc_buffer_free(channel_users);
3424 if (channel_users_modes) {
3427 for (i = 0; i < channel_users_modes_c; i++) {
3428 silc_buffer_push(channel_users_modes[i],
3429 channel_users_modes[i]->data -
3430 channel_users_modes[i]->head);
3431 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
3432 channel_users_modes[i]->len);
3433 silc_server_packet_send_dest(server, remote,
3434 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3435 channel_ids[i], SILC_ID_CHANNEL,
3436 channel_users_modes[i]->data,
3437 channel_users_modes[i]->len,
3439 silc_buffer_free(channel_users_modes[i]);
3441 silc_free(channel_users_modes);
3442 silc_free(channel_ids);
3446 /* Failure timeout callback. If this is called then we will immediately
3447 process the received failure. We always process the failure with timeout
3448 since we do not want to blindly trust to received failure packets.
3449 This won't be called (the timeout is cancelled) if the failure was
3450 bogus (it is bogus if remote does not close the connection after sending
3453 SILC_TASK_CALLBACK(silc_server_failure_callback)
3455 SilcServerFailureContext f = (SilcServerFailureContext)context;
3457 if (f->sock->protocol) {
3458 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3459 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
3465 /* Assembles user list and users mode list from the `channel'. */
3467 void silc_server_get_users_on_channel(SilcServer server,
3468 SilcChannelEntry channel,
3469 SilcBuffer *user_list,
3470 SilcBuffer *mode_list,
3473 SilcChannelClientEntry chl;
3474 SilcHashTableList htl;
3475 SilcBuffer client_id_list;
3476 SilcBuffer client_mode_list;
3478 uint32 list_count = 0, len = 0;
3480 silc_hash_table_list(channel->user_list, &htl);
3481 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
3482 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
3484 client_id_list = silc_buffer_alloc(len);
3486 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
3487 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3488 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3490 silc_hash_table_list(channel->user_list, &htl);
3491 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3493 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3494 silc_buffer_put(client_id_list, idp->data, idp->len);
3495 silc_buffer_pull(client_id_list, idp->len);
3496 silc_buffer_free(idp);
3498 /* Client's mode on channel */
3499 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3500 silc_buffer_pull(client_mode_list, 4);
3504 silc_buffer_push(client_id_list,
3505 client_id_list->data - client_id_list->head);
3506 silc_buffer_push(client_mode_list,
3507 client_mode_list->data - client_mode_list->head);
3509 *user_list = client_id_list;
3510 *mode_list = client_mode_list;
3511 *user_count = list_count;
3514 /* Saves users and their modes to the `channel'. */
3516 void silc_server_save_users_on_channel(SilcServer server,
3517 SilcSocketConnection sock,
3518 SilcChannelEntry channel,
3519 SilcClientID *noadd,
3520 SilcBuffer user_list,
3521 SilcBuffer mode_list,
3526 for (i = 0; i < user_count; i++) {
3529 SilcClientID *client_id;
3530 SilcClientEntry client;
3533 SILC_GET16_MSB(idp_len, user_list->data + 2);
3535 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3536 silc_buffer_pull(user_list, idp_len);
3541 SILC_GET32_MSB(mode, mode_list->data);
3542 silc_buffer_pull(mode_list, 4);
3544 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3545 silc_free(client_id);
3549 /* Check if we have this client cached already. */
3550 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3551 server->server_type, NULL);
3553 client = silc_idlist_find_client_by_id(server->global_list,
3554 client_id, server->server_type,
3557 /* If router did not find such Client ID in its lists then this must
3558 be bogus client or some router in the net is buggy. */
3559 if (server->server_type == SILC_ROUTER) {
3560 silc_free(client_id);
3564 /* We don't have that client anywhere, add it. The client is added
3565 to global list since server didn't have it in the lists so it must be
3567 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
3568 silc_id_dup(client_id, SILC_ID_CLIENT),
3569 sock->user_data, NULL);
3571 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
3572 silc_free(client_id);
3576 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
3579 silc_free(client_id);
3581 if (!silc_server_client_on_channel(client, channel)) {
3582 /* Client was not on the channel, add it. */
3583 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3584 chl->client = client;
3586 chl->channel = channel;
3587 silc_hash_table_add(channel->user_list, chl->client, chl);
3588 silc_hash_table_add(client->channels, chl->channel, chl);
3593 /* Lookups route to the client indicated by the `id_data'. The connection
3594 object and internal data object is returned. Returns NULL if route
3595 could not be found to the client. If the `client_id' is specified then
3596 it is used and the `id_data' is ignored. */
3598 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3599 unsigned char *id_data,
3601 SilcClientID *client_id,
3602 SilcIDListData *idata)
3605 SilcClientEntry client;
3607 SILC_LOG_DEBUG(("Start"));
3609 /* Decode destination Client ID */
3611 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3613 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3617 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3620 /* If the destination belongs to our server we don't have to route
3621 the packet anywhere but to send it to the local destination. */
3622 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
3626 /* If we are router and the client has router then the client is in
3627 our cell but not directly connected to us. */
3628 if (server->server_type == SILC_ROUTER && client->router) {
3629 /* We are of course in this case the client's router thus the route
3630 to the client is the server who owns the client. So, we will send
3631 the packet to that server. */
3633 *idata = (SilcIDListData)client->router;
3634 return client->router->connection;
3637 /* Seems that client really is directly connected to us */
3639 *idata = (SilcIDListData)client;
3640 return client->connection;
3643 /* Destination belongs to someone not in this server. If we are normal
3644 server our action is to send the packet to our router. */
3645 if (server->server_type != SILC_ROUTER && !server->standalone) {
3648 *idata = (SilcIDListData)server->router;
3649 return server->router->connection;
3652 /* We are router and we will perform route lookup for the destination
3653 and send the packet to fastest route. */
3654 if (server->server_type == SILC_ROUTER && !server->standalone) {
3655 /* Check first that the ID is valid */
3656 client = silc_idlist_find_client_by_id(server->global_list, id,
3659 SilcSocketConnection dst_sock;
3661 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3665 *idata = (SilcIDListData)dst_sock->user_data;
3674 /* Encodes and returns channel list of channels the `client' has joined.
3675 Secret channels are not put to the list. */
3677 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3678 SilcClientEntry client)
3680 SilcBuffer buffer = NULL;
3681 SilcChannelEntry channel;
3682 SilcChannelClientEntry chl;
3683 SilcHashTableList htl;
3689 silc_hash_table_list(client->channels, &htl);
3690 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3691 channel = chl->channel;
3693 if (channel->mode & SILC_CHANNEL_MODE_SECRET ||
3694 channel->mode & SILC_CHANNEL_MODE_PRIVATE)
3697 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3698 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3699 name_len = strlen(channel->channel_name);
3701 len = 4 + name_len + id_len + 4;
3702 buffer = silc_buffer_realloc(buffer,
3703 (buffer ? (buffer)->truelen + len : len));
3704 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3705 silc_buffer_format(buffer,
3706 SILC_STR_UI_SHORT(name_len),
3707 SILC_STR_UI_XNSTRING(channel->channel_name,
3709 SILC_STR_UI_SHORT(id_len),
3710 SILC_STR_UI_XNSTRING(cid, id_len),
3711 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3713 silc_buffer_pull(buffer, len);
3718 silc_buffer_push(buffer, buffer->data - buffer->head);
3723 /* Finds client entry by Client ID and if it is not found then resolves
3724 it using WHOIS command. */
3726 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3727 SilcClientID *client_id)
3729 SilcClientEntry client;
3731 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3734 client = silc_idlist_find_client_by_id(server->global_list,
3735 client_id, TRUE, NULL);
3736 if (!client && server->server_type == SILC_ROUTER)
3740 if (!client && server->standalone)
3743 if (!client || !client->nickname || !client->username) {
3744 SilcBuffer buffer, idp;
3746 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
3747 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
3748 client->resolve_cmd_ident = ++server->cmd_ident;
3750 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3751 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3752 server->cmd_ident, 1,
3753 3, idp->data, idp->len);
3754 silc_server_packet_send(server, client ? client->router->connection :
3755 server->router->connection,
3756 SILC_PACKET_COMMAND, 0,
3757 buffer->data, buffer->len, FALSE);
3758 silc_buffer_free(idp);
3759 silc_buffer_free(buffer);
3766 /* A timeout callback for the re-key. We will be the initiator of the
3769 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3771 SilcSocketConnection sock = (SilcSocketConnection)context;
3772 SilcIDListData idata = (SilcIDListData)sock->user_data;
3773 SilcServer server = (SilcServer)idata->rekey->context;
3774 SilcProtocol protocol;
3775 SilcServerRekeyInternalContext *proto_ctx;
3777 SILC_LOG_DEBUG(("Start"));
3779 /* Allocate internal protocol context. This is sent as context
3781 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3782 proto_ctx->server = (void *)server;
3783 proto_ctx->sock = sock;
3784 proto_ctx->responder = FALSE;
3785 proto_ctx->pfs = idata->rekey->pfs;
3787 /* Perform rekey protocol. Will call the final callback after the
3788 protocol is over. */
3789 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3790 &protocol, proto_ctx, silc_server_rekey_final);
3791 sock->protocol = protocol;
3793 /* Run the protocol */
3794 silc_protocol_execute(protocol, server->schedule, 0, 0);
3796 /* Re-register re-key timeout */
3797 silc_schedule_task_add(server->schedule, sock->sock,
3798 silc_server_rekey_callback,
3799 context, idata->rekey->timeout, 0,
3800 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
3803 /* The final callback for the REKEY protocol. This will actually take the
3804 new key material into use. */
3806 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
3808 SilcProtocol protocol = (SilcProtocol)context;
3809 SilcServerRekeyInternalContext *ctx =
3810 (SilcServerRekeyInternalContext *)protocol->context;
3811 SilcServer server = (SilcServer)ctx->server;
3812 SilcSocketConnection sock = ctx->sock;
3814 SILC_LOG_DEBUG(("Start"));
3816 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
3817 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
3818 /* Error occured during protocol */
3819 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
3820 silc_protocol_cancel(protocol, server->schedule);
3821 silc_protocol_free(protocol);
3822 sock->protocol = NULL;
3824 silc_packet_context_free(ctx->packet);
3826 silc_ske_free(ctx->ske);
3831 /* Purge the outgoing data queue to assure that all rekey packets really
3832 go to the network before we quit the protocol. */
3833 silc_server_packet_queue_purge(server, sock);
3836 silc_protocol_free(protocol);
3837 sock->protocol = NULL;
3839 silc_packet_context_free(ctx->packet);
3841 silc_ske_free(ctx->ske);